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Octopus, squid, cuttlefish, and nautilus all have differently shaped pupils— an octopus has a rectangular pupil.
Photo

Octopus Eyes

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the interior of an oyster shell with a pearl
Article

How Oysters Create the Ocean’s Gems

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Relatively slow moving, juvenile plane-head filefish Monacanthus hispidus (Monacanthidae) travel along with the algae. They pick off and eat small animals as they move around in the rotating sargassum ball. Adult filefish only grow to be about 11
Article

A World Adrift: Life in the Sargassum

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Sea otters floating on the surface of the ocean.
Article

Not Just Another Fuzzy Face

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A glowing ocean surface.
Article

Six Ways to See Ocean Ocean Bioluminescence

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Seahorses are the only fish species that can hold your hand! Unlike most fish that use their tails for swimming, seahorses, such as this big-belly seahorse (Hippocampus abdominalis), use their monkey-like tails to hold onto objects in their environment, li
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Seahorses Have Monkey-Like Tails

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This aptly named fish has two long fangs.
Slideshow

Creepy Critters: Marine Life Surfaces for Halloween

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S. pharaonis. Photographed in an aquarium at the visitor's center for the Hatfield Marine Science Center at Oregon State University.
Photo

Pharaoh Cuttlefish

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An image of a squid radula from a scanning electron micrograph.
Photo

Close-up of Giant Squid’s Radula

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Two clams, a mussel, an oyster, on a bed of algae
Article

Shellfish for Dinner: More than just Clams and Oysters

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Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Slideshow

Bizarre and Beautiful Coral Reef Animals

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Two octopuses sitting underwater highlight the different textures the animals can take on.
Overview

Octopuses, Squids, and Relatives

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