4fd932d3_onsters___Yu_Gi_Oh__Card_Guide__Card_Text
[Card Name] Crab Turtle [Type] Ritual Monster [Attribute] WATER [Sub Type] Aqua [ATK] 2550 [DEF] 2500 [Card Text] 
This monster can only be Ritual Summoned with the Ritual Magic Card, "Turtle Oath". You must also offer monsters whose total Level Stars equal 8 or more as a Tribute form your Field or your hand.
Yu-Gi-Oh! Level 8 Monsters - Yu-Gi-Oh! Card Guide
Card Text