I have a newly set up 10 gallon tank and have just added two male fancy guppies to my existing one. Up until now I thought that he was just younger and therefore smaller and less colourful than the new additions. But I just read the post "Guppies VS Guppies" and I suspect that he may be one of the ...others!!! He is considerably smaller, less colourful (he is half black half silver-gray with orange tail and some orange marks), his tail seems like it's been trimmed with scissors (compared to the smooth-finish, nice-flowing tails of his new mates), he is less active and likes to be mainly on his own hiding away from the others (except for the occasional playtime). Is he intimidated, or is this normal behaviour? Is he, in fact, a "normal" feeder guppy? Am I wrong to have added two male fancy guppies with him? (I didn't know there were different types until I saw them all together in the tank!) Does he need different care than the others? I am considering turning this into a community aquarium by adding a trio (1:2) of platies, a small cory and maybe a trio of zebra danios. Is that wise? I would appreciate all help from you experienced aquarists!