reef manta ray
Intelligent: Mantas have the largest brain of all fish with a network of blood vessels that surround the braincase to keep it warm.
Romantic: A male may chase (follow) a female for months, they are thought to leap in the air to impress their love and when they mate, their scoops (mouths) are intertwined.
Too romantic: Unfortunately, if she is particularly good looking other males may try and get her and sometimes 20 odd males form a train behind her. Not only that, females cannot escape attention and will get pregnant again on the very same day as giving birth.