Los narvales son cetáceos conocidos como los «unicornios del mar» por su largo colmillo recto y en espiral. Su cuerpo es largo y en forma de torpedo. Tienen los ojos pequeños, unas aletas pequeñas y una cola que tiene forma de ventilador dividida en dos lóbulos.
OBSERVACIONES
El colmillo de los narvales, que parece un cuerno que sale de su cabeza, es realmente un diente, el único ...
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