Category Archives: Fish

Arc-eye hawkfish

An arc-eye hawfish rests in a head of coral
It’s a common sight to see an arc-eye hawkfish perched in a head of coral, well assuming you’re in the water that is. If a predator comes along, they slip deeper into the coral for protection.

There are two patterns to these fish. Sometimes they’re paler than this one and have a distinctive white stripe on the side. One study has shown that the lighter fish tend to inhabit slightly deeper water where the coral is spread farther apart. Both patterns have the arc behind the eyes and the blue and red bars on the gill covers.

One of these fish is not a convict tang

A cigar wrasse swims among a shoal of convict tang.
Shoals of convict tang are common in the near-shore waters of the Big Island and it’s equally common to see a bright yellow female cigar wrasse among them. The theory is that the cigar wrasse uses the cover of the harmless shoal to surprise its prey, a variety of marine invertebrates. Seems like the cigar wrasse’s prey does not have real good eyesight.

A flowery flounder vanishes

A flowery flounder disappears against a rock.A flowery flounder swimming
Camouflage is a creature making a good match with its surroundings. This serves to conceal it from both predators and prey. In the water, there are many exponents of this approach, from octopuses to scorpionfish.

Flatfish are masters of camouflage. It’s a fluke to see a stationary flatfish. It’s almost always necessary to see one on the move and to track it to where it settles down. Once it’s set though, it will usually stay put, making it one of the easier fish to observe and photograph.

I saw this flowery flounder on the move but once it plopped onto a rock (above) I would never have noticed it had I not known it was there.

Bright-eye damselfish

A bright-eye damselfish in the waters of the Big Island
The aptly-named bright-eye damselfish is a tiny fish around 1 to 2 inches long. Despite its small size it aggressively defends its territory, usually a nook or hollow in the rock. It’s not unusual to see it come charging out at some much larger fish that has strayed too close.

Given that these fish spend all their time in one small area, often just hovering in the water, it would seem a simple matter to get a photo, but no. When they hover, they’re constantly moving, almost vibrating. And then they shoot off in one direction or another.

I’ve taken many of photos of bright-eye damselfish and the majority of them turn out to be pictures of bits of rock or coral. Locating the tiny fish on my screen is no easy matter, keeping it there, harder still. When I do manage that, often the fish is a blur or just a tail fin heading out of shot. Thus, this photo is something of an against-the-odds triumph – an entire bright-eye damselfish reasonably in focus.

Oval butterflyfish

A brightly-colored oval butterflyfish grazes on polyps of living coral head.
A brightly-colored oval butterflyfish grazes on polyps of living coral head. Since this is almost the only thing they eat, it makes them unsuitable for keeping in home aquariums.

In my attempts to identify what I see in the water, I use John P. Hoover’s book The Ultimate Guide to Hawaiian Reef Fishes, Sea Turtles, Dolphins, Whales, and Seals. His website is hawaiisfishes.com.

Undulated moray eel

A large undulated moray eel cruising in shallow water off the Big Island.A large undulated moray eel disappears into a crack in the coral
I saw this large undulated moray eel cruising in shallow water until it disappeared into, what appeared to me to be a tiny crack in the coral. John P. Hoover says of the undulated moray eel, “One of the commonest Indo­-Pacific morays, it is also one of the nastiest; do not attempt to play with it or feed it.” Words to live by.

In my attempts to identify what I see in the water, I use John P. Hoover’s book The Ultimate Guide to Hawaiian Reef Fishes, Sea Turtles, Dolphins, Whales, and Seals. His website is hawaiisfishes.com.