Category: Fish
The pictus catfish is native to the Amazon and Orinoco River Basins of South America and are commonly kept aquarium fish. Like other members of the Pimelodidae, pictus catfish have extremely long barbels to help them sense their surroundings and find food. They have sharp, mildly venomous spines on their dorsal and caudal fins, so caution must be used when handing them.
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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