Is “Tetra” a Scrabble word?
Yes
TETRA
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Tetra
noun
1.Any of numerous species of small South American freshwater fish of the family Characidae, popular in home aquariums.