Category: Fish
This species of lungfish inhabits a wide range of habitats in West and Middle Africa, and the northern half of Southern Africa. They have a long eel-like body, small eyes, a prominent snout, and two pairs of long, filamentous fins. During the dry season, they bury themselves deeply in the mud and go into a dormant state (estivation) in which they can survive without food and water for up to 3 ½ years.
https://en.wikipedia.org/wiki/West_African_lungfish
http://www.petsource.org/aquatic-by-species/aquatic-fresh-water/3533-grey-african-lungfish.html
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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