Outing marine mammals
Gray whales

Gray whales travel in sex-segregated groups for 8 months of the year. What do the whales do during their time together?

Male homosexual interactions are frequent in northern summering waters and during the northward migration. The whales begin by rolling around each other and onto their sides, with much splashing of water. Sometimes, two males rise out of the water several feet in a throat-to-throat position. The whales rub their bellies together and position themselves so that their genital areas are in contact. Usually one or more has an arching, erect or semi-erect penis. Often, two or more males intertwine their penises above the water surface. Some companionships last for a few hours, others last for years.

The majority of male gray whales are probably bisexual. They interact homosexually during migrations and in the north, and interact heterosexually in the calving waters in the south.

Female homosexual interactions also occur.

Reference

Bagemihl, Bruce (1999) Biological Exuberance: Animal Homosexuality and Natural Diversity (New York, NY: St. Martin's Press).