Here is a summary of the episode: Cephalopods biologically are closely related to gastropods where open and closed circulatory systems are the main driver of the difference but ecologically cephalopods are closer to fish. Through evolution, the protective shell of cephalopods has been reduced...

This is the short intro to this show. I will be publishing a new episode every end of the month having a marine species on focus for about 20 min. Enjoy it!! --- Send in a voice message: https://anchor.fm/gled-guri/message