Fiji – Yasawas Part 3 – Night Snorkel & Bull Sharks

Although I spent most of my time in Fiji in the water, I did take the opportunity to visit a local village during my stay. Many of the people who worked at the hotel I stayed at came from this nearby village. We had a tour guide for our visit and he said that a lot has changed since the resort was built. Walking around town, there were solar panels providing electricity to many houses as well as backup water tanks. Most houses had moved their kitchens indoors out of the rain. We were able to peek inside the local church, medical offices, and school but none of these were in session.

The most interesting thing for me was the lali drum in the center of the village near the church. When it is hit, it makes a deep resonant sound that calls villagers in for meetings or to celebrate an event. Lali drums are still used today and continue to play an important role in Fijian culture and traditions.

Fijian church, lali drum, alphabet paintings on school wall

I had already done a night dive, but I figured I could squeeze in at least one more night adventure at the next place I stopped. It ended up being a good one. I saw a Partridge Tun Snail that was over a foot long and slowly making its way along the seafloor. Their main source of food is sea cucumbers which are also much more plentiful at night. There were also a couple of turtles and reef sharks ominously swimming around us. Every so often I’d catch a glimpse of a tail or a fin. Reef sharks are generally not aggressive and they feed on tiny fish and crustaceans. They seemed to be mostly curious about the group of humans in the water while keeping their distance.

Partridge Tun Snail, Green Sea Turtle (with remoras on its back), Blacktip Reef Shark

Sea cucumbers come out in force in the evening hours. I continue to delight in all the shapes, sizes, and textures that they come in. They are so strange and loveable, looking like giant blobs making their way ever so slowly across the ocean floor.

Greenfish Sea Cucumber, Pinkfish Sea Cucumber, Leopard Sea Cucumber

The one in the photo below is a bit smaller, but while in Fiji I saw a Graeffe’s Sea Cucumber that was over two feet long. During the same night snorkel, our guide also managed to spot another day octopus out and about after dark. I’m beginning to think this species needs a new common name, although plenty of people insist they do see them during the day as well. At first glance, the Lion’s Paw Sea Cucumber looks almost like a snake lying on the seafloor. Once it starts moving, though, it resembles a wrinkled, expandable garden hose slowly inching its way across the ocean floor.

Graeffe’s Sea Cucumber, Day Octopus, Lion’s Paw Sea Cucumber

To be honest, I’m generally not that into fish. Some species, like the lagoon triggerfish (also the state fish of Hawaiʻi), are relatively easy to identify because their patterns are so unique and distinctive. When I first started snorkeling, I often felt overwhelmed trying to identify and name different species. After each trip, I would go home, download my photos, and carefully upload them to iNaturalist so I could learn their names. That approach was genuinely helpful. I began to recognize different fish shapes and groupings, even if the specific species names did not always stick.

In many ways, that is still how I think about fish. Does it fit into a group I already recognize? Or does it stand out as something distinctive? Are the patterns interesting? Does it have an unusual color pattern or a unique shape? Any of these traits might prompt me to reach for my camera and pay closer attention when identifying it later on iNaturalist.

There is no single right way to learn about sea life. It is perfectly fine to snorkel or scuba dive and simply appreciate the beauty of coral reefs without knowing any names. For me, learning some of their names adds another layer of enjoyment. Names open the door to a deeper understanding, giving me access to each species’ story, behavior, diet, and role within its ecosystem.

Snubnose Dart, Lagoon Triggerfish, Bluefish Trevally

These giant clams also have a symbiotic relationship with dinoflagellates, just like the corals I mentioned in the last blog, a relationship known as photosymbiosis. The phytoplankton carry out photosynthesis and produce sugars that provide about 60-70% of the energy the clam needs to function. The rest of its diet comes from particles it filters out of the surrounding water.

Small Giant Clam, Small Giant Clam, Noah’s Giant Clam

The clam has two openings in its mantle: the incurrent siphon, which it uses to draw water in, and the excurrent siphon, which it uses to expel water. In between, it filters detritus and plankton from the water and transports them to its mouth for digestion.

Small Giant Clam, Fluted Giant Clam, Noah’s Giant Clam

The first time I snorkeled with a California Leopard Shark I remember how my breath caught just for a moment, before my brain could remind my body to calm down and just enjoy the experience. Leopard Sharks are harmless, but much of the media surrounding sharks has turned all sharks into feared creatures far out of proportion to the actual risk they pose. We are about 50 times more likely to die from being struck from lightning than being attacked by a shark.

Nonetheless, I’ve had to learn to manage my fear and recognize real risk versus perceived risk. The black and white reef tip sharks in the photos above rarely ever attack humans. There are a handful of records of them biting humans, but generally they are shy and remain apart from divers.

There are however three species that account for the most shark attacks: Great White Sharks, Tiger Sharks and Bull Sharks. I have absolutely no interest in cage diving with Great White Sharks, but one resort in Fiji has been offering daily Bull Shark dives for over two decades, and I signed up.

Bull Shark (with two remoras close by)

Remoras are interesting fish with a suction-disk on top of their heads that allows them to attach to the undersides of larger animal. They eat the leftover morsels that the sharks don’t grab, as well as waste 💩 that comes from their hosts.

close up of Bull Shark face, Remora attached to bottom of shark’s head

Bull Sharks have the scientific name Carcharhinus leucas. The first part comes from the Greek karcharos which means sharp and rhinos which means nose. Leucas from the Greek word for white which apparently refers to their white underbelly.

This dive is very different from regular scuba dives. The dive starts with a swim over a shelf and then descends to a viewing platform. All the tourists crouch on their knees behind a rock wall and everyone has a bodyguard standing behind them. Each bodyguard has a metal pole that ends in a triangle shape (see photo below). They use this pole to gently guide the shark away from the tourists when they get too close. Once everyone is ready, other staff members start feeding the sharks fish heads. Tours happen twice a day and the sharks are really good at showing up for meal times.

bodyguard pole, male shark’s reproductive organs called claspers

In the picture above, the male shark’s claspers are also visible. For whatever reason, male sharks have two organs that can be used to inseminate a female shark. They only use one at a time during intercourse, apparently whichever one is more convenient based on which side they are on.

The sharks did get very close and often swam right next the divers. I thought the whole experience was magical and surreal. There were several giant sharks swimming around me, but inside I just felt completely calm. I felt safe and protected by my bodyguard and just very lucky to have the experience.

more shark close-ups (notice the hook on the shark’s mouth)

This video doesn’t fully capture the experience, but it at least gives a small taste of what it was like. (I recommend watching it in full screen.) Also, I want to give a big thank you to the scuba staff photographer who taught me how to properly use white balance at depth so my photos are finally coming out much closer to their true colors.

Fiji – Yasawas Part 1 – Cool Caves and My First Night Dive

I went to Fiji in November of last year, but I’m finally getting around to writing it up. The next few posts are heavy on the photo dumps, which seems to be my default when I spend most of my vacation in the water.

For this trip, I headed to the Yasawa Islands arc that stretches up in a curve from the western side of the main islands. At the very top are the Sawa-I-Lau caves. Tourists are only allowed in the first two caves, the rest are considered sacred and only locals may enter them. To get from the first cave to the second, guides helped me swim through a six-foot underwater tunnel. One gave me a big push while another pulled me out on the other side, so all I really had to do was hold my breath and kick. It was a bit nerve-racking going in, but easier on the way out since I could swim toward the light. This island is made entirely of limestone, while most of the surrounding islands are volcanic. For me, the most interesting part of the caves was a freshwater eel swimming in the brackish water. I asked a lot of questions about it, but no one had any answers, only assurances that it would not hurt me.

first cave, freshwater eel in the cave, cave skylight after swimming underwater in the second cave area

While waiting to take the boat back to the hotel, I found a cute little pipefish in the sandy bottoms. These are related to seahorses, but have a different body shape. Some people get these confused with the tiny eels that live in sandy bottoms (that I saw later on this trip), but they really do have distinctive postures and head shapes. That purple blob in the photo caught my attention too. At first I thought it was a soft coral, but when I got closer I could see it was covered in tiny tentacles. It is always fun to come across organisms that look completely different that what you expect.

Reeftop Pipefish, Haddon’s Anemone, Spotted Garden Eel

I went to Fiji because I got a great deal on a direct flight and because it’s at the very edge of the Coral Triangle. I’m always looking for nudibranchs and figured I would find a few. While there, I also decided to get my Advanced Open Water certificate so that I can dive slightly deeper dives (up to 30m / 100ft). I ended up being the only student on this trip, so I had a personal guide who helped me spot all these beautiful sea slugs. I had to learn how to do compass navigation and a variety of other skills, but after those were finished, it was all about taking cute photos of underwater life.

Slender Roboastra, Loch’s Chromodoris, Lined Nembrotha

Sky Blue Phyllidia, Striped Phyllidiopsis, Baby Sergeant Major Fish

In addition to nudibranchs, there were also a bunch of flatworms which are also extremely impressive and come in a variety of shapes and colors. The one in the middle was surreal and only a few inches long. We looked it up in dive book and although the genus is known, it’s still an undescribed species (or was when the book was published).

Sapphire Flatworm, Pseudobiceros sp., Family Pseudocerotidae

Sea stars also come in an amazing variety of shapes, sizes, and textures. All three of these were new to me!

Indian Sea Star, Egyptian Sea Star, Thousand-Pores Sea Star

In addition to all the diving, I also did a fair amount of snorkeling. The corals next to the resort were pretty shallow and most of the days, the waves were calm. Usually I think of algae coming in red, green and brown varieties, so it was a bit of a shock to see the yellow one below. It looked like an underwater succulent in bloom. This species actually grows quite tall, but this one was just a baby. For the record, even though it was yellow and green, it does, in fact, belong to the brown algae family.

Ornate Turbanweed, Sea Grapes, Pennyweed

Here’s a small selection of fish from snorkeling. The more time I spend in the water, the more different species start to reveal their distinct personalities. I’ve seen porcupinefish all over the world, but they are almost always tucked underneath rocks or along reef walls. If you get too close, they retreat further into hiding, but otherwise they tend to stay in one place, quietly watching and waiting. On the other hand, flashy surgeonfish are zipping around all over the reef like they can’t stay in one place. The morays are always wedged into the rocks, mouths open waiting for something to swim by.

Spotted Porcupinefish, Striped Surgeonfish, Snowflake Moray

Of course, there was coral everywhere and this yellow fan coral stood out because of its bright coloration.

Knotted Fan Coral, Lithophyllon concinna

However, the star of the show was this color-changing coral. These belong to the genus Cladiella and the coral retracts its feeding polyps when it’s touched, which causes its color to change.

Blushing Corals (genus Cladiella)

As part of my Advanced Open Water certification, I asked to do a night dive since I had never done one before. I’ve always enjoyed night snorkeling because all kinds of critters come out at night that don’t appear during the day. While waiting for my boat to be ready, the Fijian sunset was incredible. #nofilter

absolutely stunning Fijian sunset – on the way to the night dive

Eventually, my guide and captain sailed us over to the dive site. This was, by far, my favorite dive of the entire trip. Diving at night, illuminated only by bioluminescence and flashlights, is awesome. Here are my top three favorite photos from the dive, especially the one in the middle. Bubble coral is pretty easy to see during the daytime, but the pointy tentacles underneath only come out at night. The clam on the right is actually bioluminescent, and I wish we had turned off our flashlights to see its colors. However, to get that photo, my guide was illuminating it from below, and I was upside down, holding on to a rock, attempting to get my camera into position inside a hole. The fact that we got a photo at all was kind of a minor miracle.

Bushy Feather Star, Bubble Coral, Electric Fileclam

The site is called the Cabbage Patch because of the huge scroll coral. It’s hard to picture how large these piles of corals are, but the giant rosettes are easily two to three times the size of a human. During the day, all kinds of life hang out inside the whirls, but at night, the parrotfish settle in for a nap.

Cabbage Coral (a.k.a. Yellow Scroll Coral), sleeping Blue-barred Parrotfish, more Cabbage Coral

In addition to the sleeping fish, I found an octopus, which ironically is known as the Day Octopus because it’s one of the few octopus species that is actually diurnal instead of nocturnal. The manta rays also get more active at night; this one was roaming all over the place. During the day, these are usually nestled into the sand.

sleeping Yellowbar Parrotfish, Day Octopus, Oceanic Fantail Ray

High up near the top of the cabbage coral, we found this foot-long crab crawling along as we were doing our safety stop near the surface. Earlier, I’d found the cool green and purple urchin and my guide had spotted one of the fried egg nudibranch species.

Sawedged Spooner Crab, Globe Urchin, Phyllidia Nudibranch

I still have no idea what kind of cnidarian is in the first picture below. It looks a lot like the tentacles on a bubble coral, but could just as easily be an anemone. If one of you knows what it is, please leave me a comment. I also saw my first night anemone. My guide didn’t know what it was, so it was fun to be able to identify something for him. Although it’s a super blurry photo, it was exhilarating to see a siphonophore up close. I teach about these in my Marine Biology class and they really are a strange group of colonial cnidarians. They are made up of multiple individual organisms working together as one colony. Some parts help it to feed, some parts keep it afloat, but all of the parts share nutrients and resources. The Portuguese Man O’ War is probably the most commonly known siphonophore, but I always imagine them looking more like the one below.

Anemone or Coral?, Night Anemone, Siphonophore

I wholeheartedly recommend night diving. It’s definitely worth the hassle and cost. Well, that about sums up my first stop in Fiji, more photos of marine life coming soon. 🙂

Scuba Diving in Sangalaki – Part 2

Here’s the second blog post filled with marine creatures from Indonesia. Remember you can click on an any image if you want to see it in more detail. First up are the arthropods – lots of crabs, shrimp, and lobsters.

Anker’s Whip Coral Shrimp, Bubble Coral Shrimp, Lisa’s Mantis Shrimp

Hamodactylus boschmai, Baba’s Crinoid Squat Lobster, Squat Anemone Shrimp

Anemone Porcelain Crab, Banded Coral Shrimp, Soft Coral Crab

And now, a cute collection of clownfish.

Clark’s Anemonefish, Spine-cheek Clownfish, Ocellaris Anemonefish

Followed by some cuttlefish and a turtle. Most cuttlefish I’ve seen in aquariums are quite small, but these are a couple feet in length. They are incredibly still and you could swim right by one and not even notice. In fact, on my first dive I saw one and grabbed my guide’s leg to get his attention. He thought I was in some kind of distress, but quickly calmed down when he saw the cuttlefish I was fangirling over.

Needle Cuttlefish, Unknown Cuttlefish, Hawkbill’s Sea Turtle

There were also rays and eels.

Bluespotted Fantail Ray, Common Moray, Oriental Bluespotted Maskray

And lots and lots of fish.

Twinspot Blenny, Many-host Ghostgoby (with parasites), White-spotted Puffer

The crocodile flathead was a new one for me and I have so many questions about how the flap of skin over its eyes help or harm its vision. The harlequin sweetlips swims like a bat out of hell (see video below). My guide Maja took the photo of it where it looks so calm and I still have no idea how he did it, because it almost never stops moving.

Crocodile Flathead, close-up of its eye, Harlequin Sweetlips

Smallscale Scorpionfish, Starry Puffer, Jointed Razorfish

Moorish Idol, Forceps Butterflyfish, Pacific Trumpetfish

In Jakarta, there were always plenty of vegetarian options, but on Derawan Island, there was a lot less choice in general because the island was so tiny. However, I found a few places that offered up rice and noodle dishes that were meat-free. I ate a lot of tempeh while I was there for protein.

indomie kuah (noodles), nasi goreng (rice), tempeh mendoan (version 1)

fancy dessert, indomie goreng (fried noodles), tempeh mendoan (version 2)