Colonies and immigrants

Didemnum sp. colonies can been found from the very shallow water up to the depth of 15 meters. These are the colonies of the tiny ascidia which love the light (photophile). There are thousands of them in every colony that you meet. A colony can be found over seaweeds, inside the P.oceanica or on rocks. I have met them in both very polluted water and in very clean. It’s hard to identify the species by the photographs but these photos seem to be of the Didemnum commune. The increase of the sea temperature seems to have given new opportunities to Didemnum sp. to emigrate to new places of the endless sea. So, as we nicknamed ascidia in previous posts, these long cousins have a similar behavior with us. They make big cities and then they leave them behind to find new worlds for development.