Today's Catch

A purple hard coral releases bundles of pink eggs glued together with sperm.

Coral Spawning

Corals are sedentery animals, so how do they reproduce? One way is sexually through spawning , when the corals release eggs and sperm into the water (often at the same time due to some sort of trigger). External sexual reproduction occurs when...

Seal or Sea Lion?

Seals and sea lions have many similarities, and are in the same family of Pinnipeds, but they lead very different lives. Seals are smaller than sea lions; male Stellar sea lions can grow to be up to 2,200 pounds. Seals also are suited to spend more...
A whale shark swims with a diver off the coast of East Africa.

Whale Shark Off Coast of East Africa

When you think of African animals, what do you think of? Probably the “Big Five:” lions, elephants, leopards, buffalo and rhinos. But Africa also has an incredible amount of marine diversity in the coral reefs and open water surrounding the...

Mandarinfish Duo

These beautiful mandarinfish ( Synchiropus splendidus ) are covered in bright blue, red, yellow and orange waves. What they lack, however, are traditional fish scales. Instead of your typical fish scales they are covered in a smelly mucus coating....
A close-up photo of Killer Algae, Caulerpa taxifolia, a seaweed that has proven to be a successful invasive species.

Killer Algae (Caulerpa taxifolia)

A strain of this green seaweed, native to the Indian and Pacific Oceans, escaped public and private aquariums in California, Japan, Australia, and Monaco. It has spread widely in the Mediterranean, replacing native plants (such as seagrasses ) and...

Ctenophore Combs - Close Up

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. Read more about jellyfish and comb jellies .

Female Manatee Foraging with a Calf on Her Back

"Wild manatees in Belize are not used to humans. Living miles offshore in mangroves, they remain shy and elusive. After weeks searching and waiting for an opportunity to photograph them, I was rewarded with an especially tolerant mother and calf. I...
Photograph of a bristly brown and white worm, with one end pressed against a pale green coral.

Fireworm Takes on Fire Coral

This bearded fireworm ( Hermodice carunculata ) must have a strong stomach -- it’s sucking on fire coral ( Millepora sp. ), which would give the unlucky snorkeler a nasty sting. Encountered in St. John, U.S. Virgin Islands, the worm in this photo is...
An 1874 photo of a squid draped over a bathtub.

First Giant Squid Photo

This 1874 photo of a squid draped over a bathtub was the first ever taken of a giant squid. It belonged to the Reverend Moses Harvey of Newfoundland. More about the giant squid can be found in the Giant Squid section .
Humpback Whale, Stellwagen Bank National Marine Sanctuary, Gloucester, MA, USA

Humpback Whale, Stellwagen Bank National Marine Sanctuary, USA

“This humpback uses its lower jaw to strain fish off the water’s surface as sea birds snatch their own meals right out of the whale’s open mouth.” -- Nature's Best photographer, Bryce Flynn. See more beautiful ocean photos in our slideshow of...