Sea Monster (Luca), All Species Wiki

Sea Monsters (Oceanimonstrum amphibius) are an aquatic species native to the oceans of Italy. They have a general humanoid shape with a tadpole-like tail, ear-like fins, and scales mimicking hair. When dry, they perfectly imitate human form. Their true forms are similar in appearance to the Gill-Man from Creature of the Black Lagoon. Likely evolved from unknown marine amphibian.

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Pixar's 'Luca' deleted scene: This sea monster got cut from the film

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Sea Monster (Luca), All Species Wiki

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Sea Monster (Luca), All Species Wiki

Pixar's 'Luca' deleted scene: This sea monster got cut from the film