Because they are very thin. They are not particularly sharp, but even a dull one can cut skin.
Fish Use Gills Instead of lungs. Gills Help fish to Breath. Fish Use Gills Instead of lungs. Gills Help fish to Breath.
You can tell if fish is fresh by checking for clear, shiny eyes, firm and elastic flesh, a mild ocean smell, and bright red gills.
all fish have gills
yes all fish have gills.
gills.
gills
gills
All fish have gills. Their gills are like lungs. And if they didn't have gills they would die.
Sea otters do not have gills because they are mammals.
Fish use gills to extract oxygen from the water passing over the gills.
Fish can sleep...and btw all fish have gills
Fish breathe using their gills. Gills are respiratory organs that extract oxygen from the water and release carbon dioxide. Water passes through the fish's mouth and flows over the gills, allowing the fish to absorb oxygen from the water.