Tidepooling at Night

A Glimpse into the Life of Caribbean Reef Octopus

With headlamps and flashlights, we slowly step across sharp rocks along the edge of the eastern shoreline. It’s 7:30 pm, and the tide is out on Long Caye on Belize’s Glover’s Reef Atoll. Our guide shines his light on a blurry turquoise blob distorted by the waves on the beige sea floor. “Caribbean reef octopus,” he says. “If you say so,” I think to myself.

We move on. Tidal Splash crabs scatter sideways at our approach. There’s another octopus! This one is in calmer seas, her characteristic shape more easily evident undersea.

She slides in our direction, out of the waves and into the still edge of the ocean where her full brilliance is revealed. Iridescent turquoise-blue and green, spotted with reddish-brown. Slithering, reaching, feeling – hunting! A few more steps and there’s another! This one is already at the water’s edge. He’s after the Tidal Spray crabs at our feet! He strikes with his long arms and misses. But he knows where they went and slinks around a rock to head them off on the other side. He strikes again in a flash and pulls one into his mantle.

At the end of the video, one crab escapes, and one does not. You can see the crab leg in the crevice on the left before the octopus pulls him down.

We watch him for a minute and then leave him with his meal.

A bright red fiddler crab pokes out of her hiding spot to shoo off a Tidal Spray crab and instantly disappears back into the shadows.

Another octopus! This one is also close to shore. She is hunting using a common octopus technique; she spreads her skirt over the bottom to siphon her prey out of the crevices where they hide. We watch her deftly catch something and begin to eat. It’s a sizable meal for her.

 Caribbean reef octopuses are a medium-sized octopus, growing up to twenty inches in diameter. They are short-lived, like most octopus, with a lifespan of just ten to twelve months. In all, along a hundred yards and forty-five minutes, we saw twelve (TWELVE!!) Caribbean reef octopuses on this walk.

Other Exotic Night Life

Also venturing out after dark in the ocean, giant sea slugs called spotted seahares creep along the sea floor. The way they move and explore their environment with their mouth and tentacles, just like a shell-less snail, identifies them as gastropods. Ruffled parapodia on their backs cover their mantle.

They secrete foul-tasting purple ink to cloud the water and deter would-be predators. I’d heard of these animals before, but never expected to see one here!

A gorgeous King Helmet conch (also a gastropod) feasting on a spiny urchin was within reach.

This is a big conch – more than a handful – with a striped, domed shell featuring a flare at one end.

Endlessly fascinating!

Lastly, a young morey eel is tucked into the safety of the coral, part of his striped body visible through a hole. He cautiously peeks his head out from the end of the coral, sees me still there, and retreats into hiding. He’s less than twelve inches long and the diameter of my thumb. A far cry from the six-foot-long green eel I saw snorkeling yesterday!

The sea is full of exotic-looking life at every turn. It never ceases to amaze. I am blessed that so many creatures reveal themselves to me. Even so, this was an exceptional shore walk.

Stay tuned for more Belize wild tales!

If you’re interested in purchasing or licensing any images you see here, please email me at SNewenham at exploringnaturephotos.com, and I’ll make it happen.

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