The Smartest Fish in the Sea?

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Today I wondered about the smartest fish in the sea, and this is what I found. The top hit was an article by Karl Gruber (Our Blue Planet/BBCearth), titled “These are the world’s smartest fish”. Well, Gruber says the Killfish are a super smart/adept species, because apparently the mangrove rivulus aka killfish (Kriptolebias marmoratus) has…

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