Another quick note on Pterygoplichthys. They can be IDed pretty quick by counting the # of fin rays in the dorsal. More than 10 rays means that they are atleast in that genus. One nice thing is that juvies even posess this trait which is WONDERFUL, especially since it's often hard to figure out what your looking at based on coloration alone. There are soooo many shades, colors and patterns. Worse than that, these attributes change with growth. 
