I observed this Dusky Morwong, Dactylophora nigricans, at Edithburgh jetty back in January 2025: –

I posted images of the fish on iNaturalist along with the following comments: –

“In all images (1st photo is best) you can see Rockpool Shrimps actively cleaning external surfaces of the client: –

 

This cleaning station had at least 10 such shrimps in position, as seen in preceding observation from this dive (the hosts were all Rockpool Shrimp as far as I know; I looked carefully for any Western Cleaner Clingfish or Ancylomenes aesopius (etc..) but found none. There were always a few juvenile Moonlighters in the general vicinity (outer end of jetty) but they didn’t appear involved with this client.”

By David Muirhead

Life member David is a long-serving Secretary of the Marine Life Society of South Australia. He has dived and snorkelled in South Australian waters for around five decades and has a particular interest in bony fishes. He is a diver photographer who loves posting photos from his dives to iNaturalist

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