The river roars in the heat of the summer. The water is clear and cool, and a respite from the high sun. An angler leans back ...

There are many fish species, and they are all unique, but they share the same basic anatomy. This includes the head, body, ...

In most fish, the swim bladder is filled with air, but in the coelacanth, it is packed with oil and fat. Both types of bladder have a similar purpose, however—to increase buoyancy. 13.

The nickname 'platypus fish' stems from the fish's long beak, which resembles that of its mammal namesake, but the comparisons stop there. When paleontologist Gavin Young pulled several fossil ...