Just wondering if anyone could help me. I got a mangrove jack about 4 months ago for my brackish set up. He is about 15-17cm long and is in with a barra of similar size. The jacks are ment to be an agro fish and a awesome feeding fish. At feed time my barra dominates and my jack looks so timid. He eats pilchard chuncks off the bottom that the barra doesnt eat. I was told my jack would smash his food as soon as it hits the water. He is the opposite. Just wondering if this is normal for a juvie jack and will he get more agro as he matures? And how can i make him aggro like people say they are?