Seahorse (noun)

1. A small, slow-moving fish with a horse-like head, which moves its head and neck in a distinctive manner.
2. A mythical creature with a horse's head and a fish's tail.

Origin:

Late 16th century: from sea + horse, probably influenced by old english sǣhors 'sea-monster', because of the appearance of the creature.

Examples:

1. I saw a group of seahorses swimming in the coral reef.
2. The seahorse is known for being able to swim vertically.
3. The story of the seahorse as a symbol of strength and power dates back to ancient mythologies.
4. The seahorse is one of the slowest fish species in the ocean.
5. The seahorse's unique body structure allows it to anchor itself to seaweed or coral.