My poor ID shark :(

On Sunday I got me one of the coolest fishes I've ever owned. He or she is an Iridescent shark (ID Shark for short). I named it Nemoy. Don't know why but it popped into my head and I liked it. So after I brought it home and looked it up I discovered that it could grow to be a meter and a half long. HOLY SHIT! I feel bad now because the poor thing is only a juvenile so it's small and is destined to live out the rest of it's days staying that way in my 2.5 gallon fish tank when it should be in a 1500 gallon fish tank. I felt bad so I got him special shrimpy pellet food to make up for it. He seems content enough.... If he lives long enough I'll put him in the biggest ass tank possible!!!