The female dolphin can be masturbated or ♥♥♥♥♥♥, depending on your gender. Roll the dolphin gently to her side, belly towards you, and prop yourself on an elbow to stay face-to-face with her.
Once comfortable, though, females initiate a series of muscular vaginal contractions that rub the entire length of your member. They may also thrust rhythmically against you, so enjoy the experience while you can, since you will rarely last longer that a minute or two. Just prior to her climaxing, she will up the speed of her contractions and thrusts. It is interesting to note that the times I have mated with females, they have timed their orgasm to mine. Whether they do this consciously or not, I don't know, but it's a great feeling to have two bodies shuddering against each other at the one time.
One thing to note: Whether you masturbate or mate a fin, male or female, always spend time with them afterwards. Cuddle them, rub them, talk to them and most importantly, show them you love them.

I heard you're a noob.