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Two California market squids mate in the waters off of California's Channel Islands.
Photo

California Market Squid

Two California market squids (Loligo opalescens) mate in the waters off of...
Seahorse couples (such as these Hippocampus histrix) greet each other every morning with a unique dance that sometimes involves changing color. The couple promenades and pirouettes together for several minutes before separating for the rest of the day. The
Photo

Dancing Seahorse Pairs

Seahorse couples, such as this pair of thorny seahorses (Hippocampus...
Two thorny seahorses sit back to back underwater.
Photo

Seahorse Lovebirds

Most wild seahorses (here the thorny seahorse Hippocampus histrix) are...
A male short-snouted seahorse with a pouch full of eggs.
Photo

A Pregnant Seahorse

Instead of females, male seahorses carry the developing seahorse embryos in a...
This close-up view of salps, which have aggregated together into a long chain, have brilliant red guts from eating red plankton.
Photo

Close-up View of Salps

This close-up view of salps, which have aggregated together into a long chain, have...
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.
Photo

Jellyfish Lifecycle and Reproduction

Throughout their lifecycle, jellyfish take on two different body forms: medusa and...
A bamboo shark grows in a thick egg case. Even within the egg case, the embryonic sharks can sense predators nearby and, in response, stop all gill movement and hold still to slip under the radar.
Photo

Shark Embryo

Sharks have young in three different ways. After internal fertilization, some...
This purple urchin Paleopneustes cristatus is seldom seen by itself, and can be found in groups of hundreds.
Photo

Purple Sea Urchin

This purple urchin Paleopneustes cristatus is seldom seen by itself, and...
Gentoo penguin mother with her chick in Antarctica.
Photo

Gentoo Penguin Mother and Chick

A gentoo penguin (Pygoscelis papua) mother stands with her chick in Antarctica....
Snapping shrimp queen with eggs.
Photo

Snapping Shrimp Queen with Eggs

This snapping shrimp female (Synalpheus regalis) is the queen of her colony which...
Cardinalfish dads protect their eggs by gingerly carrying them in their mouths.
Photo

Cardinalfish Dad with a Mouthful of Eggs

Cardinalfish (Cheilodipterus sp.) dads do their part to protect their eggs by...
Laysan albatross with a chick in a volcano looking nest on the ground made of earth.
Photo

Laysan Albatross with a Chick

The Laysan albatross (Phoebastria immutabilis) breeds mainly in Hawaii and other...

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  • Ocean Life
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    • Invertebrates
    • Plankton
    • Plants & Algae
    • Microbes
  • Ecosystems
    • Coral Reefs
    • Deep Sea
    • Coasts & Shallow Water
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    • Census of Marine Life
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    • Temperature & Chemistry
  • Through Time
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    • Evolution
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