The gill-arch is provided with a row of small projections on the inner side called _____.

Keep practicing — related questions

• Each gill consists of gill-arch which bears a double row of fine thin-walled filaments called _____.
• Each side of the head of a fish bears a bony plate called the _______.
• The unique pressure sense organ present in fish is called _____.
• Which of the following increases the surface area of the gills?
• Fishes balance themselves during their movement with the help of _____________.
• In a ______, the mouth is ventral.
• Bird : Wing : : Fish : __________
• The body of the fish shows ______. Its body can be divided into similar halves on either side of its medium.