Dolphins
There are 36 species of marine dolphins - living in nearly all aquatic environments, including oceans, coastal, estuarine and freshwater - and in temperatures ranging from less than 0°C to more than 30°C. In Britain, bottlenose dolphins are concentrated around west Wales and eastern Scotland - with the coasts of Devon and Cornwall also having pods. Scotland is home to the most northerly pod of bottlenose dolphins in the world.
The Amazon river is home to four species of river dolphin that are found nowhere else on Earth.
Marine traffic around the British Isles is amongst the most intense of anywhere in the world. Noise pollution from naval activity, the oil and gas industry, seismic surveys and underwater construction can stress and injure cetaceans. It also severely interferes with their ability to communicate, reproduce, navigate and find prey - sometimes proving fatal.
Bottlenose dolphins are usually fairly slow swimmers, travelling at about 2 mph. However they can reach speeds of over 30 mph for brief periods!
They swallow a fish head first so the fish's spines don't catch in their throat.
When hunting dolphins produce bubbles to herd their prey to the surface. They sometimes also use a hunting technique called 'fish-whacking', where they use their tail to hit fish and so stun them - making them easier to catch.
Dolphins have some of the most elaborate acoustic abilities in the animal kingdom. They make a variety of sounds including whistles, clicks, squawks, squeaks, moans, barks, groans and yelps.
Bottlenose dolphins are one of the few species, along with apes and humans, that have the ability to recognise themselves in a mirror. This is considered 'reflective' of their intelligence. Dolphins are also among the few animals that have been documented using tools. In Shark Bay in Western Australia, dolphins fit marine sponges over their beaks to protect them from sharp, harmful rocks as they forage for fish.
Bottlenose dolphins sleep with one half of their brain at a time, and keep one eye open. It's believed they do this to keep an eye out for their group - to make sure they stick together - and to look out for predators like sharks.
Bottlenose dolphins are often killed accidentally in gillnets, driftnets, purse seines, trawls, long-lines and on hook-and-line gear used in fisheries. In UK waters, bottlenose dolphins are one of the species most threatened by bycatch. WWF and its partners are working with fisheries across the world to test and encourage the use of sustainable fishing gear. One solution is attaching acoustic alarms, or 'pingers', to fishing nets alerts cetaceans to the presence of fishing gear helping them avoid it.
grf ergfwu efg f gfyewgfdgf sf us grfgdfvkj gf sgduygurgksdkfbglafga spriugiyrt bv sgf sgfouyfghfvs fgkhxvkgdfgsrg dfhfjfueoiw rohowruthr aet etat at ruyaliuru sergugrufgsgrkufgkshjr
Created by Emma Hollen
Powered by
