lol after doing a bit of research i think i have to agree with u. the tsn/rtc hybrid has more of a shovelnose head combined with red fins wheres the marble/rtc hybrid has more of a rtc head with brown fins. so im guessing i have a marble/rtc! the shopkeeper lied to me lol. oh wellz its all good. how big do they get??? can u pet them??kntrygrl4lyfe;1168952;1168952 said:those are RTCxTSN? they look like those marbles x rtc