Posts By: David Muirhead

Feb 28

February 28, 2004

Magpie Morwong

Testing a Shark Shield while snorkeling at Marino

Having used a scuba-model Shark Shield for many years, I recently had the privilege of testing the new snorkeling version which Mike Wescombe-Down of the Coastal Waters Dive Club kindly loaned me in readiness for the West Coast Blue Groper Survey (See next Newsletter?). I never actually used it on that trip as I only snorkeled in ‘safe’ inshore areas... Read more

Posted in Dive Reports, Equipment | By

Aug 30

August 30, 2002

Leafy Sea Dragon

Tumby Bay Jetty Dive

Jenni and I had a few days R and R at Port Lincoln this week so I took my gear, hoping to get a few dives. The shore/jetty dive prospects and viz at Whyalla, Cowell, Port Neill and Arno Bay varied from poor to “possibly just o.k. but let’s try the next town.” Finally at Tumby Bay, the last town... Read more

Posted in Dive Reports, Jetties, Syngnathids | By

Jul 30

July 30, 1997

Silver Dory

Dory Diary

Whilst diving with Paul and Leona Fitzgerald on the Noarlunga Tyre Reef on 30/1/97 I chanced upon a very distinctively shaped fish lurking close to a tyre pyramid. Though I cannot recall ever sighting one during my years of diving in SA waters, I was quite sure this was a Dory. I hoped that it would oblige me by either... Read more

Posted in Dive Reports | By

May 30

May 30, 1997

Corals & Sponges

Growing A Mineral Base For Coral Growth

The January 17 issue of “Australian Doctor” told of the use of electricity to create a base that coral could grow on. Dr Karl Kruszenelnicki’s “Wierd Science” column tells how magnesium and calcium-based minerals build up when electricity is passed through sea water. A layer of minerals 20cm thick took three years to build up. These acted as a base... Read more

Posted in Coral | By

Mar 1

March 1, 1997

Old Wives

Fish species seen on Dredge and Barge wrecks off Glenelg (1988-1996)

Below is a list of fish species sighted by Society member David Muirhead on the Dredge and Barge wrecks off of Glenelg between 1988 and 1996. COMMON NAME FAMILY GENUS SPECIES Boarfish, Brown-spotted Pentacerotidae Paristiopterus gallipavo Boarfish, Long-snouted Pentacerotidae Pentaceropsis recurvirostris Bullseye, Common Pempheridae Liopempheris multiradiata Catfish, Estuary Plotosidae Cnidoglanis macrocephalus Coral Fish Chaetodontidae Chelmonops truncatus Cowfish, Shaw’s Ostraciidae Aracana... Read more

Posted in Species lists | By