At a jetty/boat channel this evening and got there in time to see some green sea turtles eating dinner. There are a few of these big pink granite blocks (quarried in Marble Falls, Tx) that allow for the turtles to scoot up on to the flat surface, and munch the fresh algaes growing there. Barnacles in its back are called 'turtle barnacles' as they grown specifically on turtle shells.
This one is maybe an older juvenile. I think it's small for an adult but the way it's feeding is adult behavior. Until they become adults they are omnivores, they will eat jellyfish, fish, shellfish, etc. and it isn't until adulthood that it becomes an herbivore permanently.
I like turtles