Mark Carwardine / Close-up of barnacle on top of head of Grey whale (Eschrichtius robustus) San Ignacio Lagoon, Baja California, Mexico

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) with barnacles and whale lice, Baja California, Mexico

Suzi Eszterhas / Gray Whale (Eschrichtius robustus) spyhopping, San Ignacio Lagoon, Baja California, Mexico

Matthew Maran / Tail fluke of Humpback Whale {Megaptera novaeangliae} showing Barnacles, Barkley Sound, Vancouver Island, BC, Canada

Matthew Maran / Grey whale {Eschrichtius robustus} tail fluke, with barnacle scars (white marks). Clayoquot Sound, Vancouver Island, Canada

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) skin with barnacles and sea lice, San Ignacio Lagoon, Baja California, Mexico

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) head with barnacles, San Ignacio Lagoon, Baja California, Mexico