First time I saw these was in my single player world, saw this and thought: WTF HOW ARE THERE OTHER PEOPLE IN MY SINGLE PLAYER WORLD?!

I want to request my dolphin, but it say it will die when I summon on land, so I go in some water deep enough to swim in. It still says it will die when I spawn it in...

There is not a non-aggro ability on these guys, I can say this because I was nearly killed by a Meg while on this thing. Also check your surrounds constantly, stuff likes to spawn 3 inches from you... (like megs...)