Baby cuttlefish embryos can see outside their translucent egg cases and learn which animals are worth hunting and which aren't while they are still developing.
Basically, they're visually hunting before they're even born.
While other animals have been known to recognize vocal and chemical signatures of their parents while still in their eggs, this marks the first discovery of an animal to learn visual images before birth.
How creepy to be a crab and know that somewhere there's a developing cuttlefish baby watching you, waiting until the day it can escape from it's little egg pod and eat you. Awesome.
Link to the article:
They're watching you!