Cuttlefish Can Count to Five

Don’t look now, but this spineless sea creature may be able to count better than your toddler.

Cuttlefish need to be savvy if they want to eat. They’re always on the lookout for shrimp, fish or crabs. When a cuttlefish spots a potential victim, it shoots out two specialized, sucker-bearing tentacles and nabs it. Since these hunters have to make constant judgments about which prey are worth targeting, it would make sense for them to have advanced cognitive skills—say, the ability to count.

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