Deadly: Great White sharks circle the waters around Seal Island creating a 'Ring of Death'
Show of strength: This Cape Fur seal had no chance once the shark had got it in its mouth
Snapped up: The Great Whites swim underneath their prey and then leap out of the water, catching the seals in their jaws
Deadly: A seal with horrific injuries makes its way back to land after miraculously surviving a shark attack
Food chain: A seal leaps out of the water to catch a pyjama shark, a much smaller cousin of the Great White
Dedicated: Welsh-born photographer Dan Callister travelled to South Africa from his home in the US to capture the battle for existence around the island
Frustration: The lucky Cape Fur seal swims away as its predator leaps out of the water
Show of strength: This Cape Fur seal had no chance once the shark had got it in its mouth
Snapped up: The Great Whites swim underneath their prey and then leap out of the water, catching the seals in their jaws
Deadly: A seal with horrific injuries makes its way back to land after miraculously surviving a shark attack
Food chain: A seal leaps out of the water to catch a pyjama shark, a much smaller cousin of the Great White
Packed: Sharks are attracted to Seal Island at certain times of the year when the Cape Fur seal population peaks
Escape: A seal makes a dash for freedom as a Great White misses its targetDedicated: Welsh-born photographer Dan Callister travelled to South Africa from his home in the US to capture the battle for existence around the island
Frustration: The lucky Cape Fur seal swims away as its predator leaps out of the water