The two shows were "Into The Abyss" and Nat Geo Wild episode "King of the Reefs" about moray eels.
They found out moray eels & grouper actually hunt AS A TEAM in the reefs! The grouper's even do a head wiggle movement to signal the eel that they found a tasty treat, and to get in formation.
This blows old notions of fish intelligence away. Previously, only primates have been seen team hunting w/ a different species before.
They also caught moray's doing a "courtship" dance.
Smart little buggers...some have adapted to living under floating commercial fish nurseries...waiting for the discards to sink down...Why bother hunting? lol
On Into The Abyss, a wildlife photographer rigged a camera to go a mile or more into the fertile uncharted deep ocean....They caught a FIVE FOOT wide CRAB taking their cam bait! whooooa!
I bet there are dinosaur type creatures down there too...