Apex Sardine Run
Posted on Monday, 6 June 2011
Chris and I were fortunate enough to be hosted by friends for four days on The Sardine Run in 2010. In that time we got to dive on one bait ball for about forty minutes. It was so spectacular being “part” of a bait ball that we were utterly convinced that we needed to put a trip together in 2011.
The Sardine Run takes place most years along the east coast of South Africa. Although the sardines do not migrate they do follow the current as it pushes further north east at this time of the year, creating a feeding corridor for marine predators between Port Elizabeth and Port St Johns. This movement of a huge bio mass of potential food is vital to a whole variety of predators. It provides nine month old Common dolphin their first big feed and up to 15 000 Common dolphins can make up various mega pods as they frequent this area. Bronze Whalers, Dusky and Black Tip sharks also drop their pups in this area to give them the greatest chance to feed. Up to 180,000 Cape gannets also benefit from this mass feeding event and if you are very very lucky divers may even glimpse a Brydes whale as it lunge feeds on a bait ball that has so nicely been worked by the dolphin.
A lot has to go right to even have the privileged opportunity to dive in a bait ball feeding event. The current needs to have worked its way up the coast and ideally the water temp needs to be 17 degrees Celsius. You have to pick the right location to have the activity taking place within rubber duck range, you have to have good weather and as with everything you need to have a good experienced team guiding you. This sounds like risky business but if you strike it lucky the rewards are huge and you will find yourself experiencing the most exhilarating nature experience.
Apex had employed the expertise of Mark Addison and our group was the first boat out on The Sardine Run this year. After day three we all started to be a little concerned. Day one was spent being pounded out at sea in a very exposed rubber duck. We were soaked by the end of the day, and not due to diving. On day two there were a few signs of activity with dolphin and gannets in the area, although no sign of the sardines. Day three was bad weather. So, things were not looking good but we had a fantastic group of people with us who were very understanding with a lot of laughs to go with it.
The highlight from day two is well worth mentioning. We came across a Humpback whale that was swimming very close to a school of Bottlenose dolphin. As we approached we could see there was some interaction between the two so we quickly lined up in the water ahead of the whale. To our immense surprise the Humpback swam straight towards us with two Bottlenose dolphins just to the left and right of its head. It appeared as if the dolphin were herding the whale and I am certain that the two species were playing with each other. It was a truly beautiful sight and definitely one of the highlights of the trip for me.
Mark had told us that the bad weather could just be what we needed to change the conditions. Heading out on day four we knew it could go either way. The immediate change we saw was three times the amount of Cape gannets. They were all mostly rafting on the water but it was a good sign as we headed further south. After about 10kms from our launch site the engines on the rubber duck suddenly kicked into over drive as Mark and Chris spotted what we were looking for; Gannets diving!
Things happened really fast once we arrived in the area as dive kit was thrown on and we were all yelled at to get in as quick as possible! I felt quite stunned at the first sight I saw. It was a large sardine bait ball that was being neatly herded by dolphin and the Dusky and Bronze whaler sharks from below. Sardines use the school as a defence, the safety in numbers theory. They also do better in their escape from predators deeper below but the dolphins try their best to school the sardines to the surface. They do this by sonar stunning them and blowing bubble curtains. Once the dolphins school the sardines the various species of sharks are able to rush the ball and catch what they can. When both dolphin and sharks go into the ball, the ball itself parts like a curtain and despite the carnage it is actually a beautiful sight to behold. The first ball we had was large so although there was a huge amount going on the energy did not quiet reach fever pitch. After a while the dolphin and sharks stopped working the ball and it was all over.
Just as we come up Mark spotted another bait ball in progress which we yet again raced over to at great speed. This one was a little smaller and had both dolphin and sharks working it. Added to this a big (as in size as well) surprise was on its way to us. A Brydes whale. This was the first time I have ever seen a Brydes whale underwater so the excited scream through my snorkel was pretty loud. This animal was so fast and came blitzing past us like a freight train. In a few gulps the ball was gone. This was just a mind blowing thing to see and I can still feel my excitement as I sit here writing.