The two fish in this YouTube clip are having a serious disagreement as some amused humans watch on. The footage was captured in a fish tank, and it is likely between a jawfish and a goby. They are ...

Asia's zebra-striped archerfish "shoot" their prey with streams of water that they use as a tool, a new study finds. Archerfish aren't the only fish that use tools; the Pacific orange-dotted tuskfish ...