Moray Eel: The Shy Resident of the Rocks

Spot a snake-like head poking out of a rock crevice, mouth slowly opening and closing, and you've found a moray eel — one of the most memorable characters on a snorkel tour near Jacó. They look fierce, but the truth is the opposite: morays are shy homebodies that would much rather you keep swimming. Here's how to recognize one in our Central Pacific cove, what that open mouth really means, and the single rule that keeps everyone happy.

How to recognize a moray eel

Morays have a long, muscular, snake-like body, but you'll almost always see just the head and a bit of the neck sticking out of a hole in the rocks. Most in our waters are a mottled green, brown, or speckled pattern that blends into the reef, which is exactly why guests love the moment they finally pick one out. They hold remarkably still, so once your guide points to the right crack, you can float and watch for as long as you like.

Why the mouth keeps opening

That slow, gaping mouth looks threatening, and it's the thing everyone asks about. In reality it's how the eel breathes. Morays open and close their mouths to push water over their gills — it's the equivalent of you breathing in and out, not a warning or a snarl. Understanding that turns a scary-looking fish into a strangely peaceful one to watch.

Where you'll see them in our cove

Morays like structure — the rocky edges, ledges, and crevices around the sheltered cove near Playa Mantas we snorkel on every tour. They tuck into holes during the day and rely more on smell than sight to sense what's around them. You don't need to dive down to find one; many sit in shallow rock near the surface, and an experienced guide knows the spots where the same eels tend to live.

More shy than scary

For all their fearsome reputation in movies, moray eels are retiring animals that want to be left alone. Keep a calm distance, don't crowd the crevice, and you'll often get a long, close look at one of the reef's most fascinating residents. That little jolt of "is that an eel?" is exactly the kind of moment guests remember long after the trip.

The moray is just one face in the crowd down there. For the full lineup, read our guide to the fish and marine life you'll see snorkeling near Jacó, or see real guest photos in our reviews.