Q138 of 525 Page 254

Identify the following fishes:
(a) Fish with 5 to 7 pairs of gills; (b) Fish with air bladder.

(a) Cartilaginous fish has 5 to 7 pairs of gills for respiration; (b) Air bladder is present in bony fish which regulates buoyancy.

136

Name four Chordata classes having cold blooded animals.

137

Name the superclass of Chordata in which lateral line sense organs are found.

139

Give one example of (a) cartilaginous fish; (b) bony fish.

140

Give the scientific name of the following :

(a) Mosquito fish; (b) Flying fish.

Identify the following fishes:(a) Fish with 5 to 7 pairs of gills; (b) Fish with air bladder.