For several years, scientists have suspected that orcas have been killing and eating parts of great white sharks. Now, they have video evidence to prove it.
New drone and helicopter footage show a pod of orcas ruthlessly pursuing a great white shark in Mossel Bay, South Africa for more than an hour before going in for the kill. The video culminates with one of the killer whales gobbling up a large chunk of the shark's liver.
Being able to hover, move smoothly and efficiently through the water, and streamline your equipment is not just a matter of style and elegance but one of safety and protecting the environment.
Artificial reefs are increasingly used worldwide as a method for managing recreational diving since they have the potential to satisfy both conservation goals and economic interests.
Although there are negative impacts associated with mass diving tourism, scuba diving has the potential to generate substantial revenues. However, balancing the requirements of reef conservation with the needs of local host economies represents a considerable challenge to managers and policymakers.
The ecological role of shipwrecks as artificial reefs is well established and they are often prime and exclusive destinations for diving tourism. But they are also extremely delicate and sensitive environments.
