When sea otters lose their favorite foods, they can use tools to go after new ones

https://www.npr.org/2024/05/20/ [login to see] /sea-otters-tool-use-favorite-foods-disappearing
In parts of the ocean where sea otters face stark competition for their favorite kinds of food, some otters are getting by with the help of tools — like rocks and even glass bottles — that let them bash open tougher prey that they wouldn't otherwise be able to eat.

That's according to a new study of sea otters in Monterey Bay, California, which took a look at the tool use of individual otters to see how it affected their health and nutrition.