Predators drive Nemo's relationship with an unlikely friend

Predators have been identified as the shaping force behind mutually beneficial relationships between species such as clownfish and anemones, according to Science Daily.

The finding results from a University of Queensland and Deakin University-led study.

Dr William Feeney said the research aimed to understand the origin of such relationships, known as interspecies mutualisms, which are extremely common in nature.

"Clownfish -- like Nemo from Finding Nemo -- and anemones are a great example of this type of relationship," he said.

"Clownfish live in and around anemones, helping drive off the anemone's predators and providing it with food, while in exchange the anemone provides protection with its stinging tentacles.

A three and a half tonne UNICORN roamed the Earth with prehistoric humans 39,000 years ago before being wiped out by the Ice Age

Ancient humans lived alongside giant 3.5 tonne woolly rhinos known as 'Siberian Unicorns'.

The beast had an enormous single horn adorning its large head and scientists now believe the species lived alongside Homo sapiens and Neanderthals. 

Expert analysis has found the rhino survived until around 39,000 years ago - far exceeding the previous estimates of extinction which varied between 200,000 and 100,000 years ago, according to Daily Mail. 

The large herbivore is thought to have gone extinct as a result of sudden climate change which decimated their small populations. 

Whales change their tune regularly in order to keep it simple for their pod to remember

Every few years the songs performed by the humpback creatures are ditched in favour of more basic alternatives, according to Daily Mail.

Experts say this is the mammal's version of a re-set button and ensures that the anthemic melodies remain easy for their community to remember.

Scientists from the University of Queensland and St. Andrews University, Scotland, call this 'a cultural revolution' after studying the species for 13 years.

Focusing on 95 male humpbacks, the research revealed that gradual song changes naturally stem from individual creatures but are quickly learned by the rest of the group.

A bigger nose, a bigger bang: Size matters for ecoholocating toothed whales

Trying to find your lunch in the dark using a narrow flashlight to illuminate one place at a time may not seem like the most efficient way of foraging. However, if you replace light with sound, this seems to be exactly how the largest toothed predators on the planet find their food. A paper out this week shows that whales, dolphins, and porpoises have all evolved to use similar narrow beams of high intensity sound to echolocate prey. Far from being inefficient, this highly focused sense may have helped them succeed as top predators in the world's oceans, according to Science Daily.

A new sense enabled toothed whales to succeed in diverse habitats

32 million years ago, the ancestors of toothed whales and baleen whales diverged as the ancestors of toothed whales -- including dolphins, porpoises and sperm whales -- evolved the ability to echolocate; to send out sound pulses and listen for the returning echoes from objects and prey in their environment. This new sense allowed these animals to navigate and find food in dark or murky waters, during the night, or at extreme depths. Since then, this evolutionary step has allowed these animals to occupy an amazing diversity of habitats, from shallow freshwater rivers to the great ocean deeps.

A bigger nose, a bigger bang.

Freshwater turtles navigate using the sun

Blanding's turtle hatchlings need only the sun as their compass to guide them on their way to the nearest wetland -- and a place of safety. This is according to John Dean Krenz of Minnesota State University, lead author of a study. The study focused on how this freshwater turtle, is purposefully able to travel in a relatively straight line once it has hatched, according to Science Daily.

There are many examples of species that are able to navigate long distances, such as migrating birds, or dispersing salamanders. Some animals that move over long distances have a geomagnetic sense that guides them, while others orient themselves according to the sun's position.