Edison Format · March 2010
This effect is a Trigger effect.
Even if this card is destroyed during the resolution of a Chain, you can activate its effect after the Chain finishes resolving. It does not 'miss the timing'.
You cannot activate this effect if you have no Level 4 or lower WATER monsters in your Deck.
If your opponent controls your "Shark Cruiser" and destroys it with a card effect you cannot activate the effect of "Shark Cruiser".