Bioluminescent Sharks Set the Sea Aglow

Many deep sea creatures are bioluminescent. However, before documenting the luminescence of the kitefin shark, Dalatias licha, there has never been a nearly six-foot long luminous vertebrate creature. In a recent study, Mallefet and colleagues examined three species of sharks: Dalatias licha, Etmopterous lucifer, and Emopterus granulosus and documented their luminescence for the first time. These bioluminescent sharks are the largest bioluminescent creatures known.

Researchers studied three species of bioluminescent sharks near the Chatham Islands, New Zealand
Coastline of one of the Chatham Islands, New Zealand
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Using Environmental DNA to Find Sharks

Sharks are often known as one of the fiercest predators in the ocean. Yet they are also one of the most threatened marine species—largely because they are hunted by humans for their highly valuable fins. How do we know they are being threatened? Continue reading “Using Environmental DNA to Find Sharks”