Category: Fish
Also known as the Pacific sturgeon, this ancient species inhabits the west coast of North America from the Aleutian Islands to Central California. They have changed little in form since they first appeared 175 million years ago. White sturgeon are the largest species of bony fish in North America and the third largest species of sturgeon. While classified as bony fish, their skeletons are actually more cartilaginous than bony, similar to the skeletal structure of a shark.
ABC. It’s easy as Protandry
The largest, most aggressive female anemonefish rules the roost - she is the dominant member of the social group, and with one breeding male, the only one who reproduces. In anemonefish society, everybody knows where they stand in the hierarchy! So when she leaves the group, everybody moves up one spot - including the largest, most aggressive male, who undergoes a sex change to become the leader (and breeding female) of the group. While undergoing a sex change might sound drastic to humans, it is actually not all that uncommon in other species. Many do it, either naturally or due to environmental factors: fish, invertebrates, amphibians, some reptiles, even the occasional chicken!
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