P. chilensis can often be found in densely packed aggregations of thousands or small handfuls of just a few, or they can be found on their own — in which case they must reproduce asexually, as there is no way of them moving to find a mate. This means P. chilensis is hermaphroditic, with the gonads of both a male and a female that can release eggs and sperm simultaneously to meet as a fertile cloud in the surrounding water. If the sperm-egg collisions are successful, they will produce tiny tadpole-like offspring that will eventually settle onto a rock to grow into the adult form.
I don’t know about you, but I’m going to be looking more carefully at rocks in the future. Also possibly trees and dirt. Who knows what apparently inanimate objects might be filled with innards and holding perverse “selfing” orgies right in front of our noses? Thanks for keeping us on our toes, natture.