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Fish: charming, but not terribly bright, right? That’s been the party line for years, but it turns out that it’s not quite accurate.

Some fish actually use tools, and as researcher Culum Brown points out, the lack of studies on fish populations means that we don’t actually know the extent this skill. Opening our eyes a little might reveal some fascinating new information about creatures we’ve traditionally identified as sitting at the lowest rung of animal life — even some vegetarians don’t see a conflict with including fish in their diets!

The first documented instance of tool use by a fish occurred in 2011, when a diver noticed a blackspot tuskfish doing something odd as he drifted along the Great Barrier Reef. When the diver investigated, he found that the fish was using a rock to crack open clam shells in order to access the meat inside. It showed a degree of resourcefulness that researchers hadn’t expected to see in fish — and it wasn’t the only intelligent tuskfish behavior.

Scientists forecast that this year's Gulf of Mexico dead zone--an area of low to no oxygen that can kill fish and marine life - will be approximately 5,898 square miles or about the size of Connecticut, the same range as it has averaged over the last several years.

The number of species that can exist on Earth depends on how the environment changes, according to new research led by the University of Southampton.

By analysing the fossil record of microscopic aquatic creatures called planktonic foraminifera, whose fossil remains now resemble miniaturised popcorn and date back millions of years, the research provided the first statistical evidence that environmental changes put a cap on species richness.

Daily Arctic sea ice extents for May 2016 tracked two to four weeks ahead of levels seen in 2012, which had the lowest September extent in the satellite record. Current sea ice extent numbers are tentative due to the preliminary nature of the DMSP F-18 satellite data, but are supported by other data sources. An unusually early retreat of sea ice in the Beaufort Sea and pulses of warm air entering the Arctic from eastern Siberia and northernmost Europe are in part driving below-average ice conditions. Snow cover in the Northern Hemisphere was the lowest in fifty years for April and the fourth lowest for May. Antarctic sea ice extent grew slowly during the austral autumn and was below average for most of May.

Thousands of people spoke out this week to ask for more protection for a highly endangered and beloved population of orcas, otherwise known as the Southern Resident killer whales who live in the Pacific Northwest.

Thanks to whale watching tours, and organizations like the Orca Network and Center for Whale Research, which keeps an official census of their population, we have had the opportunity to glimpse into their daily lives. We’ve been able to celebrate births, mourn deaths and root for the elders among them, like Granny, who has been around long enough to see how drastically our actions have changed their home and families.