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.
An R package for calculating the area and location of pixels in color ranges in images, used to count the area of white-nose syndrome infection in bats.
An R package for quantifying color differences.
Eartheaters (geophagines) are Neotropical fishes that can sift edible particles out of sand, without swallowing too much sand. How?