The term "Sea gherkin" refers to a type of marine animal that belongs to the sea cucumber family. This creature is known for its cucumber-like shape and can be found in various parts of the world. However, there are different synonyms for the name. Some of the most common ones include:
1. Pipi cucumber
2. Pearl fish
3. Sea cucumber
4. Echinoidea
5. Sea pigs
6. Holothuroids.
All of these terms are used interchangeably to refer to the creature in different regions. Sea gherkins play an important role in marine ecosystems and are often consumed as a delicacy in countries like China and Japan.