Squid don't eat jellyfish, but they eat the things that eat the jellyfish. Jellyfishes put on a lightshow to attract a larger predator. It's caught in the clutches of something like a fish and has no hope for escape unless its lightshow attracts something bigger that will attack their attacker.

The giant squid has the biggest eyes of any animal on the planet. It's a visual predator.

Squid experts have been debating for some time about whether the giant squid is a passive predator that just floats around in the water and waits to bump into something. I was never one to imagine it to be passive.

Edith Widder Quotes