Dwarf Minke Whale by sbailliez on Flickr.
Common dolphins (by SteveG2001)

Common dolphins (by SteveG2001)

Wild Dolphin Play (by jurvetson)

Wild Dolphin Play (by jurvetson)

Long-finned pilot whale (by oceana.org)

Long-finned pilot whale (by oceana.org)

Common dolphins (by ah_kopelman)

Common dolphins (by ah_kopelman)

Gray whale calf (by laheringer)

Gray whale calf (by laheringer)

_DSC8537 (by Northern Experience)

_DSC8537 (by Northern Experience)

Dolphin Dance, Kona Coast, Big Island, Hawaii. (by SteveD.)

Dolphin Dance, Kona Coast, Big Island, Hawaii. (by SteveD.)

Long-finned pilot whales (by oceana.org)

Long-finned pilot whales (by oceana.org)