Although the sardines are running late this winter, a massive shoal is waiting in the wings. Sea temperatures are dropping and all indications are that we could expect a bumper sardine run. Veteran sardine watcher and Sharks Board spokesman, said his organisation had been ovserving the progress of the "greatest shoals on earth" since the middle of last month.
Sardine season is a stressful time for Sharks Board Officials. A surprise arrival of the shoals while the shark nets are still in place can result in unnecessary fatalities of sharks and marine mammals. During the run-up to the arrival of the sardines, Sharks Board officials make weekly sardine spotting flights along the southern KwaZulu-Natal and Transkei coastlines.
Yesterday, they saw a massive shoal stretching all the way from East London to just shouth of Hole in the Wall, on the Transkei Coast. The shoal had moved north about 30km since last week's spotter flight.
"The sardines are further south than usual for this time of year and appear to be moving slowly. However, conditions are good. At the moment, sea temperatures are ranging between 18 and 19 degrees. Temperatures need to be below 19,5 degrees to be cold enough for the sardines to arrive". You just never know what to expect. The only predictable thing about the greatest shoals on earth is that they are totally unpredictable. Although the large shoal should take a while to move up to the KwaZulu-Natal coast, it is the small, breakaway pockets of fish that give Sharks Board staff headaches. These "pilot shoals" - as they are often called - can move extremely fast, surprising Sharks Board officials. For this reason, officials will probably start removing some nets in the Port Edward area later this week. Drumlines will remain in place.
The sardines are not the only tardy winter visitors this year. The whales have also been slow to arrive, but are now here in abundance. When they flew this week, sardine spotters counted at least 20 humpback whales between Durban and Port Edward. In winter, the whales move from the cold Antarctic to tropical waters, where they give birth. They move back south in October, November and the beginning of December.
Other marine winter visitors are the thousands of bottlenose dolphins and the smaller, faster, common dolphins which follow the shoals to join our resident populations. Thousands of Cape gannets also arrive with the sardines, adding to the spectacle of the greatest shoal on earth.