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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 likely dumped...
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Salmon are one of the most widely loved varieties of seafood in the world. A...
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Bioluminescence is one of the more captivating adaptations that have evolved in...
Scientists describe the amazing bioluminescent creatures they encounter as they...

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The Pacific hagfish ( Eptatretus stoutii ), a fish that looks similar to an eel, has no jaw and is totally blind. They find food, often dead fish, through a specialized sense of smell and, because they can absorb nutrients...
By diving in the Curasub, Smithsonian researchers with the Deep Reef...
The long barbel on the chin of this dragonfish ( Stomias boa ) has a glowing...

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By Lindsay Aylesworth, Project Seahorse The day I stepped into my wetsuit, donned my mask, and embarked on my first scuba...
In 2003, a team of Japanese scientists analyzed the DNA of tapetails and whalefish. The results suggested that these two very different looking fishes were almost identical in one specific gene. But...
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 spotfin lionfish ( Pterois antennata ), with venomous spines extended, is native to Indo-Pacific reefs. Certain lionfish species have invaded reefs in Florida, the Caribbean and are moving up the...
CREDIT: Chris Kenaley The Mystery Develops Flash forward to 1956, when scientists described another new kind of fish. It was named the tapetail because of its long, streamer-like tail. It also had a...
In the dark, cold waters 600 meters (nearly 2000 feet) below the ocean's surface, things happen slowly. Orange roughy ( Hoplostethus atlanticus ) , deep ocean fish that were once known as "slimeheads...
Relatively slow moving, juvenile plane-head filefish Monacanthus hispidus (Monacanthidae) travel along with the algae. They pick off and eat small animals as they move around in the rotating...
Two large coral trout ( Plectropomus leopardus ) swim through a coral reef on Taveuni Island in Fiji. Coral trout are highly desired fish for human consumption, and because of overfishing, are...
The fish at left stands out against the lighter waters above. At right the same fish—now with bioluminescent structures on its underside lit—blends in. Many deep sea creatures have evolved this...
The Census of Marine Life - a ten-year effort by scientists from around the world to answer the age-old question, “What lives in the sea?” It was an international effort to asses the diversity,...
In the X-ray image of this Viper Moray Eel ( Enchelynassa canina ), note the second set of jaws in the “throat”; these are the gill arches, which are present in all fish. Gill arches support the...
Claws, spines, spikes, tentacles, and fangs. Aliens, monsters, and ghostly apparitions glowing in the night. Marine life forms have some of the best looks for Halloween—no costumes needed. From...
With gnarled teeth and a perpetual frown, the sea wolf is a creature out of our nightmares! But despite its fearsome look, it isn't a danger to humans, largely preying on whelks, crabs, and sea...
In the spring of 2011, a research crew from Oceana spent two months in the brackish Baltic Sea . The Baltic faces challenges from pollution, algae blooms, over fishing, and invasive species. Oceana...
The pinecone fish ( Monocentris japonicus ) looks like the real thing on land—covered in large scales with a dark trim. They are found lurking in caves and under ledges in the Indian and Western...
Imagine if a fish at the market could tell you where it came from; what would it say? "I came from a world of drifters," says one fish in this video. The world of drifters is the world of zooplankton...
A school of yellowfin surgeonfish, Acanthurus xanthopterus , feed near dusk off Canton Island in the Phoenix Islands, one of the world's largest marine protected areas. Think this photo should be...
Frogfish are skilled hunters and some species are capable of blending into local environments such as coral reefs . A frogfish can camouflage itself so well that prey fish will swim close by without...
By Lindsay Aylesworth, Project Seahorse The day I stepped into my wetsuit, donned my mask, and embarked on my first scuba dive was the day I decided to be a marine biologist. Little did I know that...
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