Pi 172 Anabus with accessory Respiratory organ

 

The accessory respiratory organs of Anabas consists of the following structures:(i) the supra-branchial chamber,(ii) the labyrinthine organ, and(iii) the respiratory membrane.2The incomplete division of the supra-branchial chamber into outer and inner recesses, the structure and action of the shutter, the manner of communication between the two recesses and communication with the pharynx and opercular chamber by means of inhalent and exhalent apertures are described.3The labyrinthine organ, made up of several saucer-shaped plates, is composed of and derived from modified, abbreviated and fused primary and secondary gill lamellae.

IUCN Status: Least concern