I’m always amazed and entertained by the ability of eels to disappear into a seemingly solid lump of coral or rock and then, a few moments later, emerge from some unexpected location. I mean, how do they know they’re going to find a way out? There must not be too many claustrophobic eels in the world.
This whitemouth moray eel illustrates the concept in a small patch of dead coral.
Posted in response to this week’s WordPress Photo Challenge ‘Twisted.’
There are a fair number of predatory fish in Hawaii, that eat other, smaller fish. These fish have a variety of hunting strategies, everything from ambush to outpacing their prey. Some fish team up with other predators.
Fish that employ this latter strategy include various goatfish and bluefin trevallies. These fish often accompany each other on hunts, but either or both can also be seen with other predators including eels and octopuses.
I followed this bluefin trevally and whitemouth moray eel for a few minutes and didn’t see them catch anything, but they were definitely traveling together. If the eel hung out for a while under a ledge, as they like to do, the trevally would hang around, passing back and forth or circling the spot.
This tendency is actually helpful for spotting eels and particularly octopuses. Several times I’ve seen a goatfish or two milling around a rock for no apparent reason, so I’ve waited and watched. Sure enough an eel pops its head out or, better still, the rock turns out, on careful examination, to be mostly octopus.
There you go, an actual useful tip for snorkelers.
I thought I’d seen the last of a large undulating eel when it slid under a ledge, but it re-emerged, only to slide into a crease in this patch of coral. The tail was visible for a short while, giving me this final peek, until that too disappeared.
At first I thought this was something straight out of Doctor Dolittle, a pushmi-pullyu eel. Alas, no. Instead, it’s two whitemouth moray eels wedged into the same space behind a clump of coral. While whitemouth moray eels are a fairly common sight in the water, this is the first and only time I’ve seen two together. I don’t know whether this proximity was related to breeding. Perhaps they were just helping each other stay warm! Looks like they must be pretty good friends.
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.
The distinctive markings of a zebra moray eel make it easy to spot when it’s out in the open, but they’re not as common as whitemouth morays. This one was in a relatively shallow area, working through cracks in the rock and coral.
Whitemouth moray eels are typically seen wedged into cracks, usually with just a head sticking out. This good-sized eel was jammed in particularly tightly, under a lump of overhanging coral. I think I saw the same eel again, a couple of days later, in a different spot, but in equally cramped conditions. Perhaps it’s a bit agoraphobic.
This whitemouth moray eel appeared to startle these fish, a lei triggerfish, yellow tang, moorish idol and whitespotted surgeonfish. However, it kept going, sliding into and out of cracks as eels do, until it settled between a couple of coral heads.
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.
Graham's Island 