Lagenorhynchus obliquidens

The Pacific White-sided Dolphin has three tones of color. The chin,
throat and belly are creamy white. The beak, flippers, back, and
dorsal fin are a dark gray. There are light gray patches on the
sides and a further light gray stripe running from above the eye
to below the dorsal fin where it thickens along the tail stock.
A dark gray ring surrounds the eyes.

It is extremely active ... and also readily approaches boats and bow-rides.

from: Wikipedia