The present communication relates to observations on an unusual
fishery of the Indian Mackerel Rastrelliger kanagurta (Cuvier) in the
Netravati estuary near Mangalore, lasting for about nine weeks from
the latter half of January 1958. Normally the mackerel fishery is
most active along the Konkan, Kanara, and Kerala coasts during
the September-March period, and the catches comprise mostly
immature forms ranging from 180-215 mm. in total length. There are
no previous records of mackerel fishery of any appreciable extent
from our estuaries, although Pradhan (1956) has recorded the fish
entering the estuarine waters of the Kali River at Karwar
