Okay, the marina cube is a little less than a gallon. Since this thread is not about the care, but rather to admire his colors, I will not get into detail.. But he should be placed in a heated tank at least one full gallon (I wouldn't go less than 2.5 gallons personally). The heat will help him come to life, bettas usually swim about with their tails on show all the time. I know something is wrong when my betta's close their fins lol
I would like to see Bullet warm up and put on a show! He seems to be a purpley metallic color- so it will be fantastic when he flares!