Viewing: Marine invertebrates

Mar 28

March 28, 2019

Hyperiid amphipod commensalism with Jellyfish

“Hyperiid amphipod commensalism with Jellyfish” by Steve Reynolds The cover for the March 2019 issue of Dive Log magazine featured a photo of a nautilus perched on top of a jellyfish (or sea jelly). It was taken by Mike Bartick (ending with a ‘k’) from the USA. Details can be found at https://www.divelog.net.au/dlonline.html . The caption on page 4 explained... Read more

Posted in Cnidaria, Crustaceans, Marine invertebrates, Underwater Photography | By

Mar 16

March 16, 2019

Sand Stars in West Lakes

Sand Stars in West Lakes by Steve Reynolds We recently received an enquiry from Jerusha King about starfish in West Lakes, as follows: – “Hello, recently starfish have started appearing on the lakes edge at Semaphore Park. I have lived in the area 6 years and have not observed them until the last month or so. Today spotted twelve in... Read more

Posted in Marine invertebrates, Seastars | By

Feb 8

February 8, 2019

Much More to Fletcher’s Dock Than Meets the Eye

Much More to Fletcher’s Dock Than Meets the Eye by Steve Reynolds As reported in my article titled The Dunnikier Slip (& Its Links With The City Of Adelaide) (published in our April 2008 Newsletter), Henry Fletcher built a slipway at Birkenhead between 1849 and 1851. As explained in my article, “In the 1880s, Henry Fletcher began to excavate a... Read more

Posted in Marine invertebrates, Maritime History, Molluscs | By

Oct 16

October 16, 2018

Elysia expansa, Fletcher's Dock 2018

The Port River – over 100 marine and coastal species and counting

I was first inspired to pay more attention to this often overlooked ecosystem by the discovery of the upside-down jellyfish, Cassiopea sp. there in 2016 by MLSSA president and area resident, Steve Reynolds. My personal explorations soon followed, beginning at Garden Island. There, a snorkeller can easily step into the water and explore several contrasting habitats within tens of metres:... Read more

Posted in Art & Culture, Citizen Science, Crustaceans, Mangroves, Marine invertebrates, Pollution, Underwater Photography | By

Oct 13

October 13, 2018

The Occurrence of the Venus shell, Tapes literatus, in the Port River

Last year, I found a Venus shell, Tapes literatus at the Ships’ Graveyard in the North Arm of the Port River. I reported the discovery in my article entitled Further Discoveries at the Ships’ Graveyard. More recently, two more specimens were found on the western side of Torrens Island (8 October 2018). My kayak partner (known only as Greg) picked up... Read more

Posted in Climate change, Invasive species, Marine invertebrates, Molluscs | By

Aug 18

August 18, 2018

South Australian marine biodiversity explodes onto iNaturalist.org

Marine Life Society of South Australia members need no reminding of the wonderful diversity of species present in our state and commonwealth waters. But how widely known is this out in the wider community? Up until the late 2000s, I would argue that local familiarity with marine ecology was severely limited. Those practising in specialised niches of scuba diving, marine... Read more

Posted in Citizen Science, Marine invertebrates, Nudibranchs, Species lists | By

Aug 7

August 7, 2018

Cleaner Shrimp Study

I found these details online (at https://www.nationalgeographic.com/animals/2018/07/animals-fish-shrimp-health-communication/?cmpid=org=ngp::mc=crm-email::src=ngp::cmp=editorial::add=inside_20180806::rid=7315819595) via a National Geographic email: – It is an article titled “Secret Code Prevents Cleaner Shrimp from Becoming a Meal” and it was written by Liz Langley (Published July 7, 2018). It came with a sub-title of “Reef shrimp and their fish clients use special signals that communicate cooperation, a new study says”.... Read more

Posted in Bony fishes, Marine invertebrates | By

May 14

May 14, 2018

Sprouting Sand Sponges

Our participation in iNaturalist has created some discussion that has almost cleared up an enduring mystery about the identification of this creature: – Image No.2555 from MLSSA Photo Index (Taken by David Muirhead) It has been some 11 years since my article titled Sponges of the Genus Ciocalypta was published in our May 2007 newsletter.  In that article, I wrote... Read more

Posted in Marine invertebrates | By

May 3

May 3, 2018

Tropical Stromb found on Largs Bay Beach

Steriyoula Thethes recently posted some photos of a couple of shells from Largs Bay beach on the SA Natureteers Facebook page, as follows: – (Photos courtesy of Steriyoula Thethes) “A new species of shell, Largs bay. And the last image of a shell that is becoming more common in the same area of Largs North”, said Steriyoula. There were a... Read more

Posted in Marine invertebrates, Molluscs | By

Apr 22

April 22, 2018

The discovery of tiny Upside-down Jellyfish, Cassiopea ndrosia, in West Lakes

As a result of my first discovery of Upside-down Jellyfish, Cassiopea ndrosia, in December 2016 (The Upside-down Jellyfish, Cassiopea ndrosia ), I was able to recognize the species occurring in the hundreds when I dived in West Lakes in March 2018. I first saw a single tiny specimen: – I moved in to take a closer look: – A little... Read more

Posted in Cnidaria, Marine invertebrates | By