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Hermit crabs, like this one collected in Moorea, usually protect their soft, vulnerable abdomens from predators by reusing empty snail shells. This specimen shows the crab without its customary borrowed shelter.
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Hermit Crab Without a Shell

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Male fiddler crabs, like this one collected on Moorea, wave their enlarged claw as way of signaling to other crabs, especially during mating season.
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Fiddler Crab

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This brightly colored squat lobster collected in Moorea is a common find among the coral heads. Although called lobsters, this group of crustaceans is more closely related to hermit crabs than to true lobsters.
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Squat Lobster

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A brown sea hare sits in shallow ocean water.
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Sea Hare in the Intertidal Zone

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Seagrasses don't just provide shelter for free-swimming animals, but also are a habitat for non-moving organisms, such as these sea anemones.
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Anemone on Seagrass Blade

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An Australian Giant Cuttlefish (Sepia apama) crosses a seagrass bed.
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Cuttlefish in Seagrass Bed

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A transparent ctenophore with two long tentacles.
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Arctic Ctenophore with Long Tentacles

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Throughout their lifecycle, jellyfish take on two different body forms: medusa and polyps. Polyps can reproduce asexually by budding, while medusae spawn eggs and sperm to reproduce sexually.
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Jellyfish Lifecycle and Reproduction

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“This image was captured during an evening dive in water where the largest migration on Earth occurs nightly. This miniscule squid was less than an inch long, transparent, and highly reflective, which made proper exposure extremely difficult. Over hundre
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Larval Squid, Coast of Kailua Kona, Hawaii, USA

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An Illustration of small tentacled fossils.
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Ancient Entoproct Community

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Up close look at thin tentacles of a jellyfish.
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Jellyfish Tentacles Close Up

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Comb jellies (such as this Bolinopsis species) are named for their combs: the rows of cilia lining their bodies that propel them through the ocean.
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Ctenophore Combs - Close Up

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