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Extinction is a real possibility for three species of tunas. That’s one of the messages from a new study released today online in the journal Science . Researchers assessed the range and populations of...
Starksia blennies, small coral reef fish with elongated bodies, have been well-...
CREDIT: Chris Kenaley The Mystery Develops Flash forward to 1956, when...
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Top predators along the California coast are having a rough year. Recently...

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A tornado of sardines swirls around diver and photographer Erwin Poliakoff in the Philippines. Sardines are small fish that gather in large schools, a behavior that defends them against predators. As they travel across oceans and...
"Macro shot of a whip coral goby, taken in Fiji during a trip to the...
Munch, munch. The queen parrotfish ( Scarus vetula ) scrapes algae from...

DIVE DEEPER

Dr. Carole Baldwin never expected to find seven new species of fish among the Starskia blennies she was studying at the...
If there had been room to stand up, there would have been a standing ovation. As it was, the five of us on the submersible Curasub clapped and cheered when the first three deep-reef ARMS (Autonomous...
“ This moray eel was resting among some hard coral and was mesmerized by my dive lights, making it a very cooperative subject. The moray eel rhythmically opens and closes its mouth to move water...
If youngsters get cared for at all, the mother is usually involved. But in fish and a few other groups where eggs are not abandoned, fathers are the primary care providers. Males are sometimes such...
The longspine seahorse ( Hippocampus histrix ), named for the spines covering its body, has a long snout and eyes that move independently of each other. Like other seahorses, the male carries the...
Under white light, this shortnose greeneye fish ( Chlorophthalmus agassizi ) looks unimpressive. But, in dim blue light—the type usually seen at depth—it shows its true fluorescent colors. NOAA...
You may have seen the sparkle of fireflies on a summer’s night. The fireflies produce light through a chemical reaction in their glowing abdomens, a process known as bioluminescence. But did you know...
The majestic and highly predatory red lionfish ( Pterois volitans ) , native to the Indo-Pacific, is invading Atlantic waters. The lionfish is a popular home aquarium species, and some were most...
Smithsonian Marine Science Network Postdoctoral Fellow, Seabird McKeon, returns from the Smithsonian field site in Belize. Together with Dan Barshis of Stanford University, Seabird reports on the...
The pearly razorfish’s name may be slightly misleading since it is neither as rare as a pearl nor as dangerous as a razor. It is a common fish that tends to live in clear shallow areas near seagrass...
The pre-industrial American landscape was once rightly described as a place where “the deer and the antelope roam.” On land, we take it for granted that the plant-eating deer and antelope far...
The ghoulish “blob sculpin” ( Psychrolutes phrictus ) , a deepwater fish found off the Pacific coast of the U.S. from the Bering Sea to Southern California, can grow to about 70 cm (more than two...
Pearlfish are slender, eel-shaped fish that often live inside various invertebrates including sea cucumbers. Because a sea cucumber breathes by taking in water through its anus, a pearlfish can wait...
From parrotfish that cover themselves in a blanket of their own mucus to tiny pygmy sea horses, there are some bizarre sea creatures that live in coral reefs . In this slideshow you can explore some...
A tornado of sardines swirls around diver and photographer Erwin Poliakoff in the Philippines. Sardines are small fish that gather in large schools, a behavior that defends them against predators. As...
The Palauan primitive cave eel ( Protanguilla palau ) has an evolutionary history that dates back some 200 million years . Because of this and the fact that it has retained some primitive features,...
Portrait of a yellow-green blennie ( family Clinidae ) hiding in the groove of a green brain coral.
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