Kekaimalu, the only known living hybrid of a false killer whale, shows off her baby, a female "wholphin," at Sea Life Park Hawaii in Honolulu on April 21, 2005. The baby is one-fourth false killer whale and three-fourths Atlantic bottlenose dolphin. It was previously thought that a hybrid animal such as Kekaimalu would have difficulty conceiving and birthing.
A dolphin with a severe spinal deformity was adopted by a group of sperm whales. Friendly interactions between whales and dolphins had not been observed prior to this discovery in 2011. Researchers speculate that the dolphin was separated its original group either by an inability to keep up or it may have been ostracized.