Apr 30, 2022
Prostheceraeus roseus
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Prostheceraeus roseus
Prostheceraeus roseus | ©João Pedro Silva (Remédios, Leiria, Portugal)
The Pink Flatworms, Prostheceraeus roseus is a marine species distinctive for having the back of pink or violet, with longitudinal white bands.
The photo shows a couple of Pink flatworms preparing for a mating "fight". These animals have a peculiar and violent way of reproduction. They're hermaphrodites but each one 'wants' to play the male part. They engage in a kind of fencing competition using their penises (each individual has two) as swords. The first one to actually stab the other (and injecting sperm) wins and the other will have to develop the eggs.
Animalia - Platyhelminthes - Turbellaria - Polycladida - Euryleptidae - Prostheceraeus - P. roseus