That’s how shrimpfish roll

The fish go vertical but move horizontally

Shrimpfish

TAILS UP  Speckled shrimpfish occasionally pull up their snouts, but vertical is their preferred swimming posture.

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Shrimpfish swim forward standing on their heads. And that puts a rare spin on fishy turns.

Long, skinny Aeoliscus punctulatus mostly hang tails-up in the water with their mouths probing the seabed.