User blog comment:PitchBlack696/Royal Ludroth Subspecies/@comment-3214667-20101117140517/@comment-1011548-20101127161040

Except that it's specifically stated that Royal Ludroth is male, and the little ones are his female harem in the in-game descriptions. Royal Ludroth Subspecies is probably just normal Royal Ludroth in the breeding season - bright colours to attract a mate and all that.