Abstract
A juvenile of scombrid fish of 219 mm in standard length was found in the stomach of a sailfish, Istiophorus platypterus (Shaw and Nodder), caught on longline gear in the waters of south east of Palau Is., approximately at 05°06'N, 136°20'E on Dec.6, 1966.Two other specimens of similar size to the former were found in the stomacn of a shortbill spearfish. Tetrapturus pfluegeri Robins and De Sylva, caught on longline off the Southwest Africa. approximately at 25°18'S, 05°09'E on Feb.8, 1966.These three specimens were identified with the slender tuna, Allothunnus fallai Serventy, basing upon the high number of gill rakers, slender body shape, and characters of axial skeleton. The occurrence from the waters off Palau Is.seems to be the first record of the species from the equatorial waters of the Pacific Ocean.
