Category Archives: Fish

Black triggerfish transformed

A black triggerfish showing colors when it is agitated or arousedA black triggerfish with normal coloration

Most of the time, black triggerfish look like the lower photo, a fairly uniform black, apart from two bright pale blue lines at the base of the dorsal and anal fins. However, when they become aroused or agitated, their colors can change, and this color transformation can happen very quickly. Sometimes it’s just the brilliant blue lines radiating from the eyes, sometimes the flush of yellow or orange on the sides, sometimes the blue-green lines along the side.

This black triggerfish gave me the full display, and rather than swimming off, it hung around and presented a broadside view. It’s possible it was defending its territory or perhaps some eggs.

I took the photo and swam on, not wanting to bother the fish more than I apparently already had.

A giant porcupinefish peeking

A giant porcupinefish peeks out from behind a rock

This would have been a good photo for a recent WordPress challenge, peek, but I took this after that was over. However, it also works for this week’s challenge of ‘experimental.’

My underwater photography setup is not a spiffy camera and a bank of lights, but a point-and-shoot Canon S 90 in a waterproof housing. It doesn’t have tremendous zoom capabilities so I’m constantly experimenting with ways to approach fish so I can get a decent close photo.

Taking photos in areas where fishing, spearfishing, and fish collection are banned makes things easier. Fish in those areas seem to know they have less to worry about, at least from humans, so they’re less inclined to dart off. Elsewhere it’s a different story. Often I can get reasonably close, but when I raise my camera toward them they tend to zip away, possibly thinking it’s a new type of spear gun.

The best approach I’ve found is to be as quiet as possible in the water and just drift toward something I want to photograph. In this instance, I was puttering around when I saw this giant porcupinefish headed my way. I like these fish with their big eyes and a body tapering from the huge head back toward the delicate tailfin.

This fish spotted me and dipped down behind a large lump of rock and coral. I waited, but it didn’t reappear. I eased forward, keeping the rock between me and the fish. Still no sign of my quarry, so I slid to one side and saw the tailfin fluttering. Ah ha! With my camera ready and a gentle flip of my flippers I moved to the other side where I found the fish peeking out and giving me this look. I snapped a photo and an instant later the porcupinefish pivoted and headed the other way at speed.

Despite their ungainly appearance, giant porcupinefish are good swimmers and it was soon a good distance away, but when I got home I was happy to find that I’d got this shot. I also like how the goldring surgeonfish in the photo looks suitably startled by the whole encounter.

Spotted pufferfish

A spotted pufferfish in the waters off the Big Island of HawaiiA spotted pufferfish in the waters off the Big Island of Hawaii

Spotted pufferfish can come in a variety of colors, but around here they’re mostly black or brown with white spots. Their defensive strategy is to inflate into a ball when threatened, thus making it very difficult for a predator to make a meal of them.

Actually, they’re probably doing the predators a favor since pufferfish are extremely toxic. Even very small amounts of the toxins in pufferfish can kill a human. Not surprising then that it’s illegal to serve pufferfish commercially in Hawaii, though it’s considered a delicacy in Japan. There, “fugu chefs” are licensed by the government. The properly-prepared flesh still contains trace amounts of toxins that are supposed to give the diner a warm glow. Goodness only knows what kind of liability insurance a fugu restaurant has to carry.

Sailfin tang

A pair of sailfin tang in the waters off the Big Island of Hawaii.

Sailfin tang are pretty common. Usually the ones I see are a dark brown with vertical yellow bars and a yellow tail. A close look reveals thinner pale stripes between the vertical bars. There’s a photo here.

These two sailfin tangs, that I saw in shallow, murky water, were a first for me. They’re much paler and brighter, the thinner stripes are clearly defined, and their dorsal and anal fins are extended.

According to my fish book, the fins extension could be because the fish were alarmed, but it doesn’t say anything about them become lighter when this happens. I wondered if it was some sort of mating coloration, but again, my book says the fish darken when they do that.

So I’m not sure what was going on, but was happy to have spotted them and pleased that I got a decent photo given the murky water conditions.

Gargantuan blenny

A Gargantuan Blenny rests on a patch of coralA Gargantuan Blenny rests between rocks.

This week’s WordPress photo challenge is on the theme of scale. The idea is to “experiment with placement and scale to show how big (or small) you can feel in a photo.”

These photos don’t do that. It’s not the image that speaks to scale, it’s the name. I mean, this isn’t a big blenny, or a huge blenny, or even a giant blenny. This is a gargantuan blenny. I feel like I should type the word in all caps – GARGANTUAN – to do it justice.

The photos were taken on different days, but in the same area, and it’s probably the same fish. The bright spots are more numerous toward the front and really catch the light in the second photo.

And just how big is this blenny? Typically, they top out at about 7 inches long and this fish was probably about that, but in blenny-world, 7 inches is, well, GARGANTUAN.