Australian sea lion, Neophoca cinerea
For half an hour or so I watched these two sub-adult Australian sea lions chase each other. They were playfully fighting and mimicking breeding and generally showing off to the camera in their practice of becoming adults!
Hopkins Island, South Australia
Nikon D850, Nikon 14–24mm f2.8, 1/250, f/11, ISO 400, two INON Z240 strobes, Aquatica AD850 underwater housing, homemade lens dome portby Matty Smith, New South Wales