Marine Biology

A single vertebra dug out of a rock in a stream below a New Zealand mountain in 1978 has been found to have belonged to the oldest sea reptile in southern waters, where no record of these huge beasts had existed. It dates back 246 million years.

For four years, orcas have been ramming and sinking luxury yachts, and scientists finally have an idea why. No, it's not their anticapitalist 'eat the rich' agenda, nor is it to do with territory and aggression. The truth is, well, it's child's play.

The infamous mantis shrimp is in possession of a club-shaped claw that can deliver fatal blows to everything from hard-shelled prey to thick aquarium glass. So what happens when they thump a fellow mantis shrimp foe? Thanks to science, we now know.

A newly described species of marine reptile could be the largest to ever swim the world’s oceans. The “giant fish lizard” lived more than 200 million years ago, and may give the blue whale a run for its money, size-wise.

An underwater expedition off the coast of Chile has discovered 160 species not known to live in the region, at least 50 of which are new to science. The information will inform marine protection strategies for important regions in international waters.

Despite how cute 2001's Finding Nemo's clownfish was, these colorful animals have a dark side. Scientists have found that they will 'count' another clownfish's white stripes, and will viciously attack any visitor that happens to look just like them.

Scientists have had a career-making moment, capturing on film a dolphin with such a rare skin condition that only five other recorded examples exist. The dramatic black-and-white look, or piebaldism, has never been seen on a dolphin in Australian waters.

A house made of mucus may not sound like a desirable abode, yet researchers have found that the crafty animal creating such an unappealing structure may help engineers design cheaper and more efficient pumps for industrial uses like water filtration.

A study has found that plastic additives might be stopping the reproductive habits of a shrimp-like species that is key to the marine food chain. The findings provide a different perspective on the potential damage caused by specific pollutants.

What has eyes, antennae, swimming bristles, a genes stash and a feel for autonomy? The rear end of the bizarre Japanese green syllid worm. Scientists now know how the end of the animal detaches and swims off to find a similar tail of the opposite sex.

They've lived on earth for 280 million years at least, but starfish – or sea stars – remain a huge mystery in biology. Now, long-held beliefs regarding their unique design have been upended, as genetics reveal they're not all arms but nearly all head.

Some 465 million years ago this marine scavenger was caught unawares by a mud current that would bury it alive. It had spent its last hours feasting on a large range of seafood, and now, thanks to the latest imaging tech, its last meal has been revealed.