They can grow up to 3 feet long, but this Mediterranean species of clam is facing extinction from a mystery parasite. Elena Becatoros met scientist divers racing to save them. STORY: apne.ws/jXHm1XA

The mental abilities of fish are greater than what you may think... nautil.us/issue/40/learn…

Damselfish spawning in late July, at Samothraki Island, Greece.