He doesnt have to be careful because nothing was ever offered to him he saw something i have and assumed he had a source why i dont know because i dont know him and never told him there was something for sale. Now lets be clear about the subject i know very little about rays, i helped a guy obtain small spotted sleeper gobys about 4 and a half years ago because he wanted to breed them. He was impressed with my MARBLE GOBY breeding program and would tell me about his program to breed mini motoro wich i had never heard of. I went to his house for the first time to try and help him with his goby program. He later showed me 2 180s with 2 small rays in each tank that he said were grown. Couple months later i went to sell him a belodontichys dinema and he said the rays had pups and he gave me one to raise. A little over a year and a half later i have a male ray that is very healthy energetic and eats very well that is still under 7 inches the slowest growing ray i have ever see. The man who breed him is almost 60 years old does not sell fish and knows people from ecuador and brazil and a few other countrys south of the board that he used to sell and buy dogs from. I meet him because we both bought dogs from the same kennel in ecuador. He also gets fish from time to time He could care less about the internet or selling fish and is into fish soely for his own injoyment. I know this is a very long post but i do not like how the op tried to make it seem as if something was presented to him for sale when it never was. So his claims of warning signs are bunch of bs. I havent talked to the old man since i lost my last phone so i have no clue about his program currently. NOTHING WAS EVER OFFERED TO THE OP AND NOBOBY EVERY TOLD HIM THERE WAS ANYTHING FOR SALE THE WHOLE HE MIGHT HAVE A LOCAL SOURCE AND WANT TO MAKE SURE ITS REAL BEFORE HE JUMPS OUT THERE WAS MADE UP IN HIS HEAD. Im not going back and forth on this thread because all the facts are in this post.Be careful with a local source...to my knowledge there is no difinitive way to tell if a marble will stay small other then when it stops growing,