No bones about them, invertebrates don't have a spine. They proudly wear their skeleton on the outside (or stay wobbly and do not have one at all). With your help, Redmap will be tracking the following invertebrates around Australia. Some of these species may be common along your coastline - but have you spotted any that aren't normally found at your local diving, fishing or swimming spots? Redmap is interested in sightings where these invertebrates have ventured away from their usual home range. You can sort this list by region and name.

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  Firebrick seastar

  Asterodiscides truncatus

  Distinct rounded projections on body surface with purple, red and orange colouration. Length: Diameter up to 17 cm

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  Longspine sea urchin

  Centrostephanus rodgersii

  ADULT: Spiky black ball with dark purple/ red spines with iridescent blue/green sheen to spines when looking down the shaft. The spines are…

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  Eastern king prawn

  Melicertus plebejus

  The eastern king prawn has been recorded from from northern reefs in Queensland to Georges Bay in Tasmania. To identify this prawn look for…

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  Gloomy octopus

  Octopus tetricus

  This octopus usually inhabits waters off New South Wales, commonly Sydney. You would really have to catch this octopus to easily identify i…

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  Eastern rock lobster

  Sagmariasus verreauxi

  This species is more common to New South Wales and is captured regularly in north-eastern regions of Tasmania in small numbers. Some fisher…