Ashton Abroad: Underwater Photos: Orote

I promised underwater photos and now it's time to make good on that promise! I love diving and I love taking photos, so this is basically my favorite hobby.

One of my work sites is Orote, a dive site near Spanish Steps on the Big Navy base. I was able to test out my new camera there and while I'm not super-impressed so far, I think I will be more impressed as I learn the tricks and more detailed settings of the camera. The camera I'm using is a Canon S120, which has some very cool features--most importantly, the underwater setting and the macro setting.

The underwater setting applies a red filter to everything, which is nice because I normally have to do that in processing. (Water filters out red light first, which is why underwater photos often look very blue.) Unfortunately, because I like to dive in shallow water, it sometimes makes my photos too red or makes certain colors pop out strangely. I think I prefer to apply the red myself, because then I can make sure it's just the right amount!

The macro setting is also something I'm learning to use, since I've never had a camera with that setting before. It's pretty neat but I have to hold very still for it to take a good photo. That's actually really difficult to do when you're floating around, especially if there's even a slight current. But hopefully I'll get better at it.

Another thing I have to get better at is identifying what I'm seeing! I knew most of the fish in Bonaire and most of the corals to genus level, but I know barely anything here. Fortunately I can take photos of what I see, so I can identify it later! And if it's cool or pretty, it goes here on my blog. If you happen to know more than me and think I'm wrong about an ID, make sure to tell me! :)

www.guamreeflife.com

I owe a huge thanks to Dave Burdick and his website guamreeflife.com, which helped me with a lot of these IDs. He maintains the biggest and bestest photo database for Guam's marine life, and his photos are pretty incredible. He's also a super cool guy and he works at the Marine Lab!

Time to ID some sea stuff! Remember--click any photo to see it bigger!

This guy here is a tiger cowry, Cypraea tigris. Adult tiger cowries eat coral, while the juveniles eat algae. They're native to the Indo-Pacific, although shells of this species have been unearthed at Pompeii, where they're believed to have been used ornamentally. They're still popular in the shell collection trade, and have decreased in abundance in recent years. I see these used in wall decor at the local markets. They're very beautiful!

Pretty, and quite large! Also, heads up for the ladies: don't bother painting your nails if you're going diving--the seawater just dissolves it right off. I've learned my lesson. :(

If you've been following my blog for a while, you've seen this guy before: the lionfish. In the Caribbean these fish are highly invasive, eating everything on the reef and multiplying like crazy. Fortunately they're endemic to the Indo-Pacific, and they don't cause any problems here. (Are they just as delicious here? Hopefully I'll find out.)

They're certainly more reddish here than in Bonaire.

Here's something I learned today: there are 11 recognized species of lionfish! The species in Bonaire are Pterois volitans, the red lionfish, and P. miles, the common lionfish. Both species look extremely similar, with two major differences: the red lionfish has 11 dorsal-fin rays and 7 anal-fin rays, while the common lionfish has 10 dorsal-fin rays and 6 anal-fin rays. However, both of those species have flag-like bits at the ends of their dorsal-fin rays. Therefore, I think we're looking at P. antennata!

It's a shame they're so destructive in the Caribbean because they really are beautiful fish.

This guy here is an orange-lined triggerfish, Balistapus undulatus. Pretty!

Balistapus undulatus.

This here is a wide-view photo of the reef. Orote has really great topography--lots of places for wonderful little creatures to hide!

Who wants to go to Mars when we've got places like this???

Speaking of work, I had a bit of a surprise Orote when I put down my bag...

Do you see what I didn't? (The focal length is kind of weird in this photo... the eel is actually about three feet from the bag.)
Also, notice that the bag is sitting on algae/dead coral. We try not to damage the corals!

That's right, it's a HUGE FREAKING EEL. Nearly gave me a heart attack.

Huge!!!

Now, of course I love moray eels. They are majestic, sleek, beautiful animals. But they also have very, very sharp teeth that I generally like to keep more than a meter away from my face. They aren't necessarily aggressive, but they certainly can be. A few days ago (at a different dive site) I was hammering in a sediment trap and an even bigger eel (about 8 feet long!) came up looking very indignant about all the noise I was making, bit my sediment trap, and swam away. I'm glad he didn't try to bite my hand instead!

This guy was about 5 feet long.

This is a Giant Moray, Gymnothorax javanicus. You thought I was exaggerating about the size? It's literally called a giant eel.

Okay, maybe "giant" is a little bit of an exaggeration. "Very large" is more accurate. But still, MY FACE. I like my face and I don't want any chunks taken out of it by a hungry moray eel!

Back to pretty fishies. I love butterflyfishes but there are just so many of them that I usually can't remember their names--but I remember this guy! This is a saddle butterflyfish, Chaetodon ephippium. I guess this one is pretty easy because no other butterflyfish has that big black saddle on their back. They eat algae, coral polyps, small invertebrates, and fish eggs.

Chaetodon ephippium.

This one took a little digging but I think I've got it down to genus level! This is a type of ascidian tunicate called Rhopalaea, which I definitely had never heard of until today. Tunicates, also called "sea squirts," are invertebrate filter-feeding animals. They have a sac-like water-filled body with two tubular openings that they use to draw in and push out water. Most of them are sessile (they don't move) but some swim around in the water column. There are over 2000 species of tunicates identified, one of which can grow over a meter tall!

Because they're so small and long, I had to focus on the different parts individually. Look closely!

This photo is focused on the front part of the ascidian. As you can see, there are two tubular openings, each ringed by yellow dots.

In this photo you can see the middle section. It looks kind of muscly, doesn't it?

The rear of the ascidian is in focus in this picture. That's the end of the tube!

I think these are really pretty!

Pretty Rhopalaea!

Through the power of photoshop, I was able to black out parts of the photo to focus solely on the sea squirt!

I kiiiiinda want to frame this on my wall.

Now you see the background...

Now you don't see the background!

Okay, on to more tiny things: gobies! I just love, love, love gobies. They are so small and beautiful, and there are so many kinds! I've spent hours just looking for gobies. The big stuff is cool, but once you start to pay attention to the small stuff, it's hard to go back.

This one is in the genus Eviota, also known as "dwarfgobies" or "pygmygobies." They're tiny; this one is only about 3cm long. Guamreeflife.com calls it Eviota cf. guttata, which means that it looks a lot like Eviota guttata but is probably a separate undescribed species.

This next thing... not really sure. It appears to be some sort of tube-dwelling hermit crab. I searched for "tube-dwelling crab" and I got exactly one promising result: Discorsopagurus schmitti. Only two papers talk about this crab, published in 1995 and 1996 respectively. If anybody can shed some light on this, I'd appreciate it!

Definitely looks like a crab...

Here are some cute adult, shell-dwelling hermit crabs with matching shells!

Their eye stalks make them look so dopey!

The next few photos were taken with the macro setting on my camera. Hopefully I'll learn to stay more still and get some cool photos in the future!

I think this is another type of ascidian/sea squirt. ¯\_(ツ)_/¯

Algae! At one point I knew what this was, and it's probably buried somewhere in my head... but after I took my final exam for algae class, my brain locked all that algae info away in a dark corner. But it's very pretty, isn't it? Like a beautiful, soft, fluffy pink galaxy.

Look closely. It looks like space!

This is another type of algae, probably a green alga... I don't recall ever seeing this in class. I'll ask my classmates, maybe they haven't put up a mental block against algae?

Very tiny... each little snowflake is probably less than 0.5cm in diameter.

Coral close-ups! You should know by now that coral is an animal--or rather, a colony of animals. And now we can see their mouths!

Okay, so I can't really see the mouths here. But it's very close-up and that's kind of cool!

Here we go! In the center of each of those "flowers" is a little mouth. The mouths are currently closed. The bits you see now are all hard, but at night the mouths open like tiny anemones and feed!

They kind of look like fingers reaching out... creepy.

And last but not least... my first nudibranch photos from Guam! I enlisted the help of some bona fide nudibranch experts and they decided that it's definitely in the genus Thuridilla, possibly Thuridilla undulata. The colors are a little weird for that species though. Oh well, sometimes that's how it goes!