Ricochet News

SANParks warns of Red Tide

By Nandi Mgwadlamba - Dec 17, 2015
SANParks warns of Red Tide

Two water samples collected from where the Indian Ocean meets the Knysna estuary (Knysna Heads) and also in the ocean on both Friday and Saturday morning tested positive. There is a definite presence of dinoflagellates in both water samples. Both Professor Brian Allanson of the Knysna Basin Project and Professor Bornman of the NRF/ SEAON agree there is a red tide. Bornman’s tests were conducted in the Algoa coastline (Port Elizabeth). 

Although tests are ongoing, it seems the same organisms found in last year’s algal bloom have returned to the coastline. "We are conducting further water samples to determine its toxicity as it was not certain last year whether the red tide was in fact toxic or not" says Professor Allanson.

Whilst tests are ongoing, authorities are cautioning anglers not to collect shellfish from affected areas. Users of the coastal environment are advised not to eat any fish that wash up on the shore. SANParks has also put up signage to this effect close to all affected areas.

Experts have attributed the red tide to sea conditions that are currently optimal for such a bloom formation.  So says Dr. Bornman ‘with high surface temperatures (>22 degrees C) and cold (


IMAGE sourced from raggycharters.co.za