Iridescent Shark Fish

Question
Hello, I have 3 Irridescent Schark fish that are only about 2 inches long. One of the fish seemed to get significantly bigger around the belly area. I thought I might have been overfeeding them so I cut down a little, but his belly is still getting bigger! Is it possible it is pregnant??? Hoe do I know if it is that or something else? What else could it be???

Answer
Hi Claudia;

It is unlikely to be full of eggs. He probably just gets most of the food. Those guys get over 3 feet long and need at least a 150 gallon tank so they aren't sexually mature until much larger than your little fellas are. Here are good profile pages on them for more info;

http://www.fishinthe.net/html/fishguide/fishguide_fish.php?FC=34&nl=8&nt=5
http://en.wikipedia.org/wiki/Iridescent_shark
http://www.aquariacentral.com/fishinfo/fresh/ishark.htm
http://animal-world.com/encyclo/fresh/catfish/pangasius.php

At Your Service;
Chris Robbins