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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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A glowing ocean surface.
Article

Six Ways to See Ocean Ocean Bioluminescence

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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 and Squids

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