Today's Catch

A male short-snouted seahorse with a pouch full of eggs.

A Pregnant Seahorse

Instead of females, male seahorses carry the developing seahorse embryos in a kangaroo-like pouch. During mating season, the female deposits her eggs into the pouch, and the male fertilizes them. After about two weeks of development, out pop the...

Humpback Whale in Antarctic Waters

Humpback whales ( Megaptera novaengliae ) can be found in Antarctic waters during the spring and summer in the Southern hemisphere, where they gorge on their main food source: tiny krill. How do they locate the small prey and maneuver their large...

Weedy Seadragon, Flinders pier, Flinders, Victoria, Australia

Weedy seadragons ( Phyllopteryx taeniolatus ) are found off the coast of south and east Australia. Just like seahorses , the male seadragon is tasked with caring for its eggs. The bright pink eggs are placed by the female on a brood patch on the...
Colorful layers of a microscopic foram.

A Colorful Foram: Globigerinoides ruber

This foraminifera was collected as it floated about 3 meters below the surface off the coast of Puerto Rico. The central dark area is the shell surrounded by spines. The tiny yellow dots are symbiotic algae, which live in the protoplasm of the host...
Sargassum forms dense clumps up to the size of a beach ball that slowly rotate as they drift.

Floating Sargassum Seaweed

Sargassum fluitans , a.k.a. “Gulfweed,” forms dense clumps up to the size of a beach ball that slowly rotate as they drift. The fronds are quite dense, but if you look carefully, sometimes you can see hints of the rich community that hides in the...
Up close look at thin tentacles of a jellyfish.

Jellyfish Tentacles Close Up

Stinging cells (nematocysts) line the tentacles of this moon jelly ( Aurelia aurita ). Upon contact with prey or a predator, a venom-laden harpoon shoots out to stun or kill. Read more about jellyfish anatomy in our jellyfish and comb jellies...

Sweetlips, Raja Ampat, Indonesia

The larger fish in this picture are called sweetlips ( Plectorhinchus ) because of their big, fleshy lips. There are over thirty species of sweetlips, which tend to live on coral reefs in small groups. “On an afternoon dive, I spotted a small group...

The Comeback Sea Slug

This nudibranch, or shell-less marine snail, is making a comeback to a location it hasn't been to in years along the California coast. First discovered off the coast of Southern California in 1902, Felimare californiensis was thought to be extinct...

Harp Seal, Prince Edward Island National Park, Canada

Harp seals are protected in the United States by the Marine Mammal Protection Act . Although they are not considered endangered, as sea ice melting earlier and earlier each year, available harp seal breeding grounds are being lost in the North...

Staurozoan: The Stalked Jellyfish

This rare staurozoan , or stalked jellyfish ( Haliclystus californiensis ) is about 2 centimeters in length and was collected off the coast of California. Unlike the traditional bell-shaped floating jellyfish, staurozoans live attached to rocks or...

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