I have just obtained a plastic rubbermaid horse trough that I am going to put some kind of marine critters in. The tank is 26" deep and is 5 feet across. I think it's about 200 gallons, maybe 250. Is this going to be large enough to house any kind of shark or ray for its entire life? I've read the infamous book by Scott Michael about sharks and rays but thought I'd get a practical opinion before I get my hopes too high!