Hi, wonder if anyone can help me. This fish was sold to me as an upside down catfish... now Im having serious doubts. It rarely swims upside down compared to ones in another shop, and its growing v quickly. when i first bought it it was more stripy then spotty, has developed the spots recently. is also more black then the upside down cats ive seen. I'm concerned because i think it might be one that grows so big it will eat my neon tetras. im attaching a photo!! thanks in advance!