Underwater Photo Of The Day

[ricki]

From: http://www.lifeinthefastlane.ca/sard...aculous-things





It's all about sardines, seriously. The next time you pop a tin of sardines or more accurately in this case, South African Pilchards, you may see them in a new light? These massive bait balls are chased by dolphins, sharks, whales and squadrons of gannets. The dolphins are thought to trigger the feeding behaviors captured on film at times.



From: http://marinesci.ukzn.ac.za/


More about the sardine run and dynamics at:
http://marinesci.ukzn.ac.za/biology/...rdine-run.html



From: http://marinesci.ukzn.ac.za/
Migrations often follow temperature gradients. It is thought sardine runs start when nearshore temperatures drop below 21 C. With climate change this trigger and migration have become more problematical. Runs are becoming less frequent it is said.






From: http://www.lifeinthefastlane.ca/sard...aculous-things
The bubble geyser of dive bombing gannets are memorable to see. In the first clip you can see an advancing front of gannets swimming underwater sideways like a large school of humpbacks into prey.


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