Irukandji jellyfish deliver one of the most painful possible stings. Learn what the experts say about the dreaded Irukandji ...

The rockhead poacher is a little fish with a big pit in its head. The divot may be like a drum, making sound that rises above ...

Ted Judah went diving off McAbee Beach in Monterey Bay when he caught sight of a 'silvery knife blade undulating thing,' ...

New seasonal fish and bugs are available to catch this month, plus brand new sea creatures added in the summer update.

Biologists and ecologists have long wished to gather high-quality data on exactly what the animals they study are eating, but how can such observations be made without disturbing the natural patterns ...

Puffer fish may look cute, but they pack some serious strength. This one showed just how wild things can get during a tank update.