Mark Raycroft / Black Labrador Retriever (Canis familiaris) puppy sniffing flower

Nuno Sa / Long snouted seahorse (Hippocampus guttulatus) in captive breeding laboratory at University of Algarve, Portugal. June 2010. Overall winner of the Underwater Photographer of the Year competition 2015.

Juergen Freund / Researchers Guido and Katja Westhoff work in a mobile lab in the bush. To handle the deadly Common death adder (Acanthophis antarcticus) Guido puts the head and upper portion of the snake in a plastic...

Mark Raycroft / Chocolate Labrador Retriever (Canis familiaris)

Mark Raycroft / Black Labrador Retriever (Canis familiaris)

Mark Raycroft / Black Labrador Retriever (Canis familiaris) balancing treat on snout

Mark Raycroft / Black Labrador Retriever (Canis familiaris) pair sitting near autumn leaves

Mark Raycroft / Chocolate Labrador Retriever (Canis familiaris) adult portrait

Mark Raycroft / Chocolate Labrador Retriever (Canis familiaris) portrait of a puppy sitting next to blooming chives in herb garden

Mark Raycroft / Chocolate Labrador Retriever (Canis familiaris) adult portrait

Mitsuaki Iwago / Labrador Retriever (Canis familiaris) mother resting with puppy

Doug Gimesy / Scientist examining river water to tests for platypus DNA. Cesar Research Laboratory, Melbourne, Victoria, Australia. June, 2017.Model released.