The TCG text of “Catapult Turtle” is now officially confirmed as
“Once per turn: You can Tribute 1 monster; inflict damage to your opponent equal to half the Tributed monster’s ATK on the field.”

It is unknown when “Catapult Turtle” will receive a reprint to reflect this change.

Source: http://www.db.yugioh-card.com/yugiohdb/card_search.action?ope=2&cid=4095