Jessica Beckham, Spider crabs on the march in Port Phillip Bay (Wildlife and Animal 2018)

A sight to be seen when the spidercrabs make their annual migration into the shallows to moult their outer shell. Safety in numbers is the key as they are defenceless in their newly formed soft shell and an easy, free meal for any passing smooth ray.

Images have been resized for web display, which may cause some loss of image quality. Note: Original high-resolution images are used for judging.