Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Shane Gross / Lemon shark pup (Negaprion brevirostris) in mangrove forest which acts as a nursery for juveniles of this species. Eleuthera, Bahamas.

Chase Dekker / Red Fox (Vulpes vulpes) kit, Washington

Sebastian Kennerknecht / Harbor Seal (Phoca vitulina) pup, Elkhorn Slough, Monterey Bay, California

Sebastian Kennerknecht / Harbor Seal (Phoca vitulina) pup, Elkhorn Slough, Monterey Bay, California

Mark Raycroft / German Shepherd (Canis familiaris) puppies, North America

Mark Raycroft / Golden Retriever (Canis familiaris) puppy, North America

Mark Raycroft / Cocker Spaniel (Canis familiaris) puppy playing, North America

Five Films / Female Grey seal (Halichoerus grypus) defending pup on beach, chasing male away, Horsey, Norfolk, November.

Dave Bevan / Two male Grey seals (Halichoerus grypus) fighting in surf, with a female and juvenile nearby, Norfolk, England, UK. December.

Dave Bevan / Grey seal (Halichoerus grypus) pup playing with a small piece of wood on a beach, Norfolk, England, UK. December.