intr.; ten-gallon a., that can contain ten gallons; ten-gallon hat, sombrero, a high-crowned, wide-brimmed hat of a kind esp. worn in the south-western U.S. (cf. Stetson); ten-gauge a., having a calibre such that ten balls of matching size weigh one pound; also ellipt. for ...
6) When I was new to the hobby, I had a 55-gallon tank with 2 Gold-Bar gobies, 1 flame hawk, 1 domino damsel and a blue damsel. Everything was nice enough until I saw the prettiest fishever! I should have looked up the social skills attributed to a Harlequin Tusk Wrasse before I...