Marine Invertebrates

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Marine Invertebrates

Anemones, Jellyfish, Comb Jellies & allies (Cnidaria & Ctenophora)

Crabs, Prawns, Barnacles & allies (Crustacea)

Sea Shells, Sea Slugs, Octopuses & allies (Mollusca)

Sea Stars, Sea Urchins & allies (Echinodermata)

Other Marine Invertebrates

Latest sightings

Macrobrachium australiense at Brookfield, QLD - 2 Sep 2025 by DougT

Unverified Sponge at Wallagoot, NSW - 31 Aug 2025 by AlisonMilton

Unverified Jellyfish or Hydroid at Wallagoot, NSW - 31 Aug 2025 by AlisonMilton

Unverified Other Marine Invertebrate at Wallagoot, NSW - 31 Aug 2025 by AlisonMilton

Unverified Polychaete Worm at Nambucca Heads, NSW - 13 Aug 2025 by trevorpreston

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Discussion

Jennyncmg wrote:

3 Sep 2025

Sorry I dont know what species and they are really difficult to ID

Unverified Sponge

Jennyncmg wrote:

3 Sep 2025

sorry I cant tell from the photo - nearest would be a umbrella/moon jelly (Aquorea eurhodina) but it's usually easy to see the 4 underside lobes.

Unverified Jellyfish or Hydroid

KimberiRP wrote:

29 Aug 2025

This sighting of a freshwater species is misplaced under 'Marine invertebrates'. It should be under 'Other arthropods: Crustaceans: Other crustaceans' (Other Crustaceans).

Macrobrachium sp.

KimberiRP wrote:

29 Aug 2025

This sighting is misplaced under 'Marine Invertebrates'. It should be under 'Other invertebrates', and may be a flatworm (see: Flatworms (Platyhelminthes))

Unverified Polychaete Worm

MichaelMulvaney wrote:

29 Aug 2025

Thanks for the wording Tworivers

Macrobrachium australiense