Mackerel from the Andaman Sea

The study of the mackerel (Genus Rastrelliger Jordan and Starks) of the Andaman Sea is of special interest in as much as it covers an area adjacent to the Indonesian waters \nfrom where as recently as 1951 de Beaufort recognised three species of mackerel, the validity of one of which is open to question. Fishery workers in India have hitherto recognized only a single species af mackerel, Restrelliger kanagurta (Cuvier) from Indian coastal waters and in this connection also the Andaman Sea presents an interesting area for study. In the course of a number of collectioils from there by members of 'this Institute including the \nauthors in 1960-61, it has been possible to obtain material of two distinct species of mackerel, sufficient io enable drawing up a detailed comparison.