goby
nounUK /ˈɡəʊbi/
US /ˈɡoʊbi/
A goby is a small fish that often lives on the bottom of the sea or in rivers.
We saw a tiny goby hiding in the sand at the beach.
OTHER MEANINGS
2. A type of small fish with a sucker-like fin on its belly that lets it cling to rocks.
The clingfish-like goby stuck to the glass of the tank.
3. Any of many species of small, often colorful fish kept in home aquariums.
He added a bright yellow goby to his saltwater aquarium.
4. A person who is easily fooled or gullible (informal, dated slang).
Don't be such a goby and believe everything you hear.