Forum:Super ancient deepsea king colecanth VS. Royal oppression

OK i have a question about the effect of deep sea kings special summon ability, basically it says to ditch one card in hand to summon as many fish type monsters from the deck to the field as possible, but having their abilities and them being able to attack gone. now my friend used royal oppression against the deep sea king. being the rule shark that he is he said that he only had to pay 800 even though i was trying to special summon 4 fish at the same time. so in short my question is can royal oppression kill my king with the opponent only paying 800 no matter how many i try to summon( and i already no the at king would be dead by oppression ) so yeah thanks.