Viewing: Marine invertebrates

Feb 11

February 11, 2016

Mysid Photos from Second Valley Dive

During our recent dive at Second Valley, David Muirhead took a couple of photos of what he thought were late larval planktonic phase southern rock lobsters. Below is a cropped version (by David) of one of his photos: – ?“Juv. Rock Lobster, ready to settle out of water column, Second Valley 6-2-16”? (with bullseye in background) He thought that they had swum inshore to get ready to settle on a rock reef (such as at Second Valley). He sent one…

Posted in Crustaceans, Marine invertebrates | By

Feb 6

February 6, 2016

Photos of a beach washed Swimming Anemone, Phylctenactis tuberculosa

Phil Woodard has reported the discovery of a beached specimen of the Swimming Anemone, Phylctenactis tuberculosa on Henley Beach on 3rd February 2016. “The recent storm probably dislodged it from its rock,” he said. “Quite a lot of anchored seaweed has also washed up with stones attached. I still have the specimen in salt water although sadly it was DOA to the beach. Happy to send photos if required,” he said. We told Phil that we would love to see…

Posted in Marine invertebrates | By

Feb 4

February 4, 2016

Warning of hefty penalties for reef picking

That heading comes from PIRSA as part of a warning to fishers regarding rules for removing organisms  from intertidal reefs in SA. Reef Watch says that it gets quite a few reports from members of the public who have observed people taking organisms off intertidal reefs. The taking of marine organisms from intertidal reefs was banned along the shore of Gulf St Vincent (from Brighton jetty to Cape Jervis) in 1995. Details of the ban were mentioned in our April 1995…

Posted in Coastal activities, Coastal species, Conservation, Fisheries, intertidal zone, Marine invertebrates, Marine Protected Areas, Molluscs, Regulation | By

Sep 20

September 20, 2015

Sea urchin barrens and mini-barrens

Our Patron, Scoresby Shepherd, was one of the editors of “Ecology of Australian Temperate Reef – The Unique South”, along with Graham Edgar. It was published in 2013. When the book was being prepared for publication, a little earlier on, Scoresby contacted me about one of my photos that had been published in our March 2009 newsletter (No.363). The photo in question was the one on the bottom of page 5, showing “A congregation of Heliocidaris erythrogramma sea urchins at…

Posted in Marine invertebrates, sea urchins | By

Mar 19

March 19, 2015

Alan Paskett - Sepia apama, Black Point, 3-4m June 2014

Cuttlefish of South Australia

Before I embarked on the production of the documentary film Cuttlefish Country, I had little appreciation of the diversity of cuttlefish species which are found in South Australian waters. When I discuss cuttlebones with friends or strangers, I’m usually met with surprise at the revelation that cuttlebones found in beachwash along the South Australian coast represent not one, not two but several species of cuttlefish. It is also unfortunate that there is no single resource available whereby South Australian naturalists or beach combers…

Posted in Cephalopods, Marine invertebrates | By

Jan 4

January 4, 2015

Black Cowry (Zoila friendii thersites) at Port Noarlunga - Dan Monceaux

Black Cowry (Zoila friendii thersites)

Yesterday, while snorkeling at the Port Noarlunga reef in near perfect conditions I was fortunate enough to encounter a South Australian endemic gastropod mollusk, the Black Cowry (Zoila friendii thersites). The animal I sighted was perched quite conspicuously on a large yellow/orange sponge in about three metres of water. I later discovered that a photograph taken by Greg Adams of one in the midst of laying eggs (also taken at Port Noarlunga) was published in October 2014 by ABC news. I was first made…

Posted in Marine invertebrates, Marine Protected Areas, Molluscs, Pollution | By

Dec 16

December 16, 2014

Sepia officinalis © Sebastian Niedlich CC BY-NC-SA 2

New research shows shipping sound impacts cuttlefish

Cuttlefish become stressed when exposed to shipping sound and panic when exposed to loud, low-frequencies, according to two scientific papers published this year. The Marine Life Society of South Australia believes that these results should trigger increased research efforts into the impact of shipping noise on the Giant Australian cuttlefish aggregation at Point Lowly, near Whyalla in South Australia. They argue that the matter is time critical, given anticipated shipping increases should current iron ore export plans receive environmental approvals this month. In a study published…

Posted in Acoustics, Cephalopods, Marine invertebrates, Molluscs, Pollution | By

Nov 30

November 30, 2014

Buried Shovelnosed ray, Glenelg by Dan Monceaux MLSSA

Nocturnal observations around Glenelg marina and jetty

While this weekend’s scorching hot temperatures kept my wife and I out of the sun for the most part, we couldn’t resist making a late night beach walk down at Glenelg. While the habitats there are highly modified due to breakwater and marina construction, dune removal for coastal development plus stormwater, Patawalonga and treated wastewater inflows, there remains an abundance of life to be observed by anyone with an eye for detail and a nice bright flashlight. Emma and I…

Posted in intertidal zone, Invasive species, Jetties, Marine invertebrates, Pollution, Sharks & Rays, Stormwater | By

Nov 25

November 25, 2014

Glycera polycheate worm - Hans Hillewaert

The Blood Worm, Glycera americana

Long-term MLSSA member Brian Brock says that he has been interested in Palolo worms since his early student days at the University of Adelaide. According to Britannica , Palolo worms are segmented marine worms of the families Eunicidae and Nereidae (class Polychaeta, phylum Annelida). Their breeding behaviour is unique. During the breeding season, at the same time of year and a particular phase of the Moon, the worms break in half. The tail section (the “epitoke”) bearing reproductive cells, swims to the surface, where it releases…

Posted in Marine invertebrates | By