The catchily named Nothobranchius kadleci is the fastest-maturing vertebrate species known to science. In just over two weeks, this fish can reach sexual maturity and start laying eggs — and those eggs only need another 15 days before they are ready to hatch. So why does this species need to cram an entire generation…
Certain species of longtail carpet sharks (or bamboo sharks) have an unusual means of locomotion. Instead of swimming, these sharks wriggle their bodies and push against the floor with their pectoral and pelvic fins. It's a strange sight to behold.
It's easy to think gluttony is a uniquely human trait, that animals ruled by their baser instincts are at least equipped with an innate sense of just how much is too much. But one recently discovered pike begs to differ.
How better to end the day than with some ichthyological flatulence? Thanks to an undersea robot, we've recorded some fish off the coast of Florida producing some previously unknown sounds. And the best explanation really is that the fish are farting.
The whitefish of Europe's Alpine lakes were once a single species, but after the Ice Age they split into separate species, adapting their look and lifestyle to their particular watery home. But this amazing biodiversity would have to be sacrificed.
Science is always good for an awesomely counter-intuitive finding, and this one has to be the mother of them all. Despite the fact that life itself originally came from the sea, the same can't be said of the ocean's current occupants.
To adapt to their eternally dark surroundings, Mexican cavefish have gone blind, lost their pigment, and changed their sleep cycle. You can see one in the photo up top. Here's the weird thing though...all those fish are the same species.
Guppies have been a separate species for 500,000 years, and during that time their color has changed drastically. But one thing has stayed the same: an orange patch on males. This is quite possibly the most romantic adaptation ever.
When animals practice monogamy, we can generally tell right away. After all, couples like to hang out together, whether they're humans or squirrels or hawks. But one fish keeps its monogamy so top-secret that researchers actually called their pairings "invisible."
Here is the first ever video of a fish using a tool. Specifically, an orange-dotted tuskfish using a rock to crack open a clam. But it might not be long before fish are using clams to crack open our skulls.
These fish are native to the limestone caverns found deep beneath the Somalian desert. As you might imagine, these are creatures of eternal darkness, and thus the terms "night" and "day" are meaningless. And that's what makes their biological clocks so bizarre.
National Geographic has given us an exclusive preview of tonight's episode of Shark Men. In the episode "Surfing with Sharks," the research team attempts to tag a youthful and rowdy great white shark, who isn't going in without a fight.
In 1964, Sports Illustrated ran a piece on scientists experimenting with LSD for commercial fishing applications. Researchers hoped that LSD could both facilitate the removal of invasive carp and dope up commercial fishing populations on a large scale.
Researchers have discovered an elusive wood-eating catfish in northeastern Peru. This approximately 2-foot-long catfish uses its teeth to scrape wood from submerged trees.