Doug Perrine / Female Hawaiian monk seal (Monachus schauinslandi) fighting with a male trying to mate with her, Molokai Island, Hawaii, USA.

Doug Perrine / Hawaiian monk seals (Monachus schauinslandi) aggressive male attacks a five and a half week pup, mother (right) approaches to intervene; Papaloa Beach, Kalaupapa, Molokai, Hawaii, USA

Aflo / ic-09002 Hawaiian monk seal swimming underwater {Mirounga angustirostris} Hawaii

Doug Perrine / Humpback whale {Megaptera novaeangliae} performing a peduncle throw. Pacific (taken under NMFS research permit 882 issued by Hawai Whale Research Foundation)

Doug Perrine / Humpback whale {Megaptera novaeangliae} with penis extended, Pacific (taken under NMFS research permit 882 issued by Hawai Whale Research Foundation)

Doug Perrine / Humpback whale {Megaptera novaeangliae} performing a peduncle throw. Pacific (taken under NMFS research permit 882 issued by Hawai Whale Research Foundation)

Michael Pitts / Hawaiian monk seal {Monachus schauinslandi} Pacific

Flip Nicklin / Hawaiian Monk Seal (Monachus schauinslandi) pair playing, Hawaii

Mitsuaki Iwago / Hawaiian Monk Seal (Monachus schauinslandi) portrait, Hawaii

Doug Perrine / Pantropical spotted dolphin leaping high above surface {Stenella attenuata} Kona, Hawai (Non-ex).

Michael Pitts / Hawaiian monk seal pair courting off Midway Atoll,Pacific Ocean

Staffan Widstrand / Hawaiian Goose, or Nene (Branta sandvicensis) Maui, Hawaii. Endemic.