hello im new to keeping rays i dont own any yet but im looking to find out some basic facts on them like which is the easiest to keep and most outgoing also i see that all rays for sale are labled male and female y does that atter so much does everyone want to breed them or are one more aggressive than the other? also where is the best place to get a cheaper ray. and what added facts should i know about them as a noobie to rays. thank you