Answer:

tetra

AnswerCrossword Clue
TETRAAquarium fish
TETRAAquarium resident
TETRAPopular aquarium fish
TETRATropical fish
TETRAFishbowl fish
TETRAFour in front?
TETRAFour: Pref.
TETRAFish that sounds like it should be in a group of four
TETRAAquarium swimmer
TETRAAquarium denizen
TETRACommon aquarium fish
TETRAAquarium favorite
TETRAColorful swimmer
TETRAFave in a tank
TETRAFlashy little fish
TETRAColorful tropical fish
TETRAColorful fish
TETRAAquarium brightener
TETRAAquarium sight
TETRADi- doubled
TETRAFour: Pref.
TETRABright fish
TETRAChloride lead-in
TETRAColorful aquarium fish
TETRAFish in a tank
TETRAHalf of octa-
TETRAPrefix with -cycline
TETRABrightly colored tropical fish
TETRAPrefix with fluoride
TETRATank swimmer
TETRAFlashy tank fish
TETRANumerical prefix
TETRAPopular household fish
TETRAColorful tank fish
TETRA"Four" at the fore
TETRAPenta- minus one
TETRAAquarium dweller
TETRACardinal ... (aquarium fish)
TETRANeon ... (fish)
TETRAKind of tropical fish