Figure 1. The lenses and body size of three piscine species were shown for comparison. A: The eye lenses isolated from zebrafish, rice eel, and catfish. The arrows indicate two small-size lenses for zebrafish and rice eel, and one big-size lens from catfish. The ruler with number marks shown at the bottom is used for size comparison. Body-size comparison among (B) zebrafish (C) rice eel and (D) catfish. The arrows indicate the location of eye lenses.