Check out the awesome moment this cuttlefish swam right up to a swimmer to say hello! Tim Ryan, 56, was out swimming when he noticed a cuttlefish swimming around him, ...

The “up” sign involves a cuttlefish extending one pair of arms upward as if swim dancing to the Bee Gees song “Stayin’ Alive” while twisting its other arms together in the middle.

GEORGE TOWN: Consumers must refrain from eating dried cuttlefish as tests by the Consumers Association of Penang (CAP) revealed that it is contaminated with a highly toxic metal known as cadmium.

The cuttlefish’s apparent waving behavior reveals a new aspect of their sophistication, and opens up a new avenue for researchers to investigate their smarts using machine learning.