fish

We don't know how fish swallow food, but we do know they regularly swallow things half their own size (or more). We used biplanar X-ray video to track swallowing in 3D in catfishes.

Does the way fish feed influence the likelihood that they will evolve to use their mouths for parental care?

Eartheaters (geophagines) are Neotropical fishes that can sift edible particles out of sand, without swallowing too much sand. How?