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Abstract,On a section between Bermuda and Puerto Rico, in MarchlApril 1981 Anguilla sp. larvae abundance and hydrographic conditions were studied. The small larvae ( < 7 mm TI) occurred south of 30° N a t the subtropical thermal front and showed peak abundance a t 26" N. At 2 3 O N larvae of all size groups became less abundant. North-south extention of the spawning area was greater than described in the literature. A considerable net avoidance of the larvae during daylight hauls was observed. Lengths of both Anguilla species increased from the north to the peak abundance area in the south and for A . anguillu also from east t o west. Patches with about the fifty fold larvae abundance compared with the surrounding area could be identified. Deeper occurrence of the smallest larvae (T1=4 and 5 mm) compared with older larvae, found in earlier studies could be stated.

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