“Seascape with Sharks and Dancer” is a play by Don Nigro, who is among the most frequently published and widely produced playwrights in the world. Ben, who lives in a beach bungalow, has taken a lost girl from the ocean. Soon she finds herself torn between the need to rest somewhere, and her certainty that relationships end in nightmares. Everything becomes a kind of war over love and creation that no one can lose.