jawless vertebrate (noun)

1. The jawless vertebrates were often depicted in ancient mythology as powerful and mysterious creatures from the depths of the sea.

2. In the world of fantasy literature, the protagonist encountered a mythical jawless vertebrate that held the secret to saving his kingdom.

3. The blockbuster movie consisted of thrilling underwater scenes where jawless vertebrates swam alongside the main characters, creating a sense of danger and excitement.

4. As they strolled along the beach, the couple admired the graceful movement of the jawless vertebrates gliding through the water, finding it strangely romantic.