The Deep (2015 Animated Series)

The Deep is a 2015 Canadian-Australian animated series based on the graphic novel series by Tom Taylor and James Brouwer. It focuses on the Nektons, a family of deep sea researchers.

The Twilight Zone (Season 1, Episode 25)
When the fish in the sea off the coast of Korea go missing, the family finds them scattered around a strange anglerfish brought up from the depths through a hot water flow. When parents Will and Kaiko attempt to remove the fish from the higher regions of the ocean, they fall under the creature's spell, leaving the children Fontaine and Antaeus to rescue them... until Antaeus himself falls under the fish's sway.

Antaeus makes reference to an unseen past incident where he hypnotized Fontaine to believe she was a penguin.