Imagine you’re a Japanese eel, swimming around just minding your own business when—bam! A predatory fish swallows you whole and you only have a few minutes to make your escape before certain death.

In less than 25 years, an invasive fish has become the apex predator of the Susquehanna River in eastern Pennsylvania. Flathead catfish have been flourishing in the river since 2002, growing to 30 to ...

Add Yahoo as a preferred source to see more of our stories on Google. Of the 32 eels that were swallowed whole by dark sleeper fish in a recent study, nine of them successfully escaped to safety izumi ...

Species numbers alone do not fully capture how ecosystems are changing. In a global study, scientists analyzed long-term data ...