Some fish, it turns out, are morning people. They swim hard during daylight, sleep mostly at night, and tend to live longer.

By midlife, an animal's everyday behaviors can signal how long it is likely to live. That is the striking conclusion of a new study in which researchers put scores of short-lived fish under continuous ...

A study has found that observing how actively a fish moves in its youth and when it sleeps can help predict whether it will ...

By tracking nearly every movement of a tiny fish's life from adolescence to death, a new study reveals a hidden behavioral blueprint of aging – one ...

African killifish like the one pictured typically live just a few months, which helps research study them across their entire lifespans. Claire Bedbrook and Ravi Nath tracked dozens of killifish ...

The annual killifish lives in regions with extreme drought. A research group now reports that the early embryogenesis of killifish diverges from that of other species. Unlike other fish, their body ...

Claire Bedbrook (left) pulls an African killifish tank from a shelf as Ravi Nath looks on. Bedbrook and Nath showed that aging proceeded in discrete steps and that behavior relatively early in life ...