I know that sharks can go into a feeding frenzy and that they're pretty vicious and have little regard for lives of other people... [ GOD DAMN IT KISAME. Why are you impacting her mind and views on nature. ] Dolphins are cute but they're really smart. They avoid poison spikes by using sponges to uncover them, so that's pretty smart! The killer of the sea is definitely the shark, they kill everything. Killer Whales kill a little less. [ citation needed. ]

Well, some ninja leave spikes on various places so other ninjas get injured so they can be taken down quickly. It probably does hurt, but most ninja are a little cautious for themselves - and others - so they don't get hurt. Don't worry, Fuuko. You won't ever step on a nail. [ she hopes. ]