(This card is always treated as "Water Dragon".)
You can banish this card you control; Special Summon 3 Level 5 or lower Dinosaur monsters (WATER or WIND) from your Deck in Defense Position (but their effects are negated), also you cannot Special Summon from the Extra Deck for the rest of this turn, except Dinosaur or Sea Serpent monsters. You can only use this effect of "Light Water Dragon" once per turn.