Saw a nature show with footage of a big reef fish - maybe a grouper? - who invited a moray eel to go hunting with them. The eel flushed out the prey from narrow hiding places, the fish killed it, and they shared the rewards.
Another show I saw explained that young occapuses don’t normally learn from their elders, but it was starting to happen I think near the island of Capri! Older occapuses began showing the young 'uns how to deal with many things, often with marvelous results. A young 'un had learned from their elders an amazing method of dealing with an eel. An eel was threatening a group of occapuses, and one of the smol ones threw themselves at its head, and firmly wrapped her/his tentacles around the eel’s face, clamping shut its scary mouth!
When the occapus finally let go, the eel fled at damn near light speed.
