So I'm the new person around here and introdurelinquishment. I'm Amber and just making the leap from the average aquarist to a monster keeper. I currently have The Boss who is a 12.5" iridescent shark and his tank buddy a 10" iridescent. They were a relinquishment from someone who under estimated their size potential. They grew up in a 55g setup. I just got these guys yesterday and currently homing them in my 75g until my 150g arrives.