Vampire tetras can reach 40" (max wild length) reports say they have never exceded 20-24" in captivity, last group I had made 14"-16" before I sold them off. They actually dont swim alot(outside of them liking a current but staying in one place), they can, and have the ability for huge speed bursts, but they are a thin fish, not a long hauler like salmoniods.They are a hunting machine, hovering lower to mid water column, at a slight downward angle, waiting for some poor bastard to swim above them. When something does go above them they impale them from below with their huge lower fangs. Probably the only fish Im actually nervous around and really wont put my bare hand in their tank, and Ive had alot of crazy mean fish....The more I talk about them the more I miss them...and they look so nice in a black tank with a blue hued light cuz they have such a reflective metallic body. Their a little more active than a school of piranahas, but look way nicer in my opinion, and they bring a whole new meaning to "mean" fish. natural food in the wild is piranahas. Damn, screw my last post, who needs luck, I want a school of these fish again!!! And yeah you can get them in canada Anthony, Im not sure who else brings them in but I would be importing them for myself again.