Yes those are Colombian shark cats. They are just over two years old. The biggest one is 13"ish, they are actually going in a 220 with the Lionfish pretty soon, they keep knocking over my corals. I've had them with mollies, for a little while as they ended up being lunch. They have been raised from babies in freshwatet into brackish then into full Marine.
I'll try and make some room soon. I've gotta get my Monti out anyways and into my sps tank before the sharks kill it anymore.