Porpoise (noun)

A small, gregarious marine mammal that is similar in appearance to a dolphin, but has a more rounded body and a shorter snout.

Origin:

The word 'porpoise' is derived from the old french word 'porpeis', which was in turn derived from the latin word 'porcopiscus', meaning a kind of fish. it has been used to refer to the small marine mammal since the late 16th century.

Examples:

1. The porpoise leapt gracefully out of the water and dove back in, leaving a trail of bubbles in its wake.
2. Porpoises are known for their playful and social behavior, often riding the bow waves of boats.
3. The porpoise's skin is covered in small bumps called tubercles that are thought to help reduce drag in the water.
4. Fishing nets can be dangerous for porpoises, as they can become entangled and drown.
5. The porpoise's diet consists mainly of small fish and squid, which it catches using its powerful jaws and sharp teeth.