Peculiar feeding behavior of Asterorhombus intermedius in an aquarium.

概要

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The feeding behavior of <I>Asterorhombus intermedius</I> was describedfrom aquarium observations. When frozen krill placed in the tank had descendedto the bottom, the fish would approach it to within. 10 cm, at that point lifting its first dorsal-fin ray to an angle of 45°, before returning it to its original position viaa sideways movement to an angle of 45° from the vertical plane. On completion of the fin movement, the fish continued to move toward the food, suddenly darting to it over the final 1.5 cm. The rotary motion of the first dorsal-fin ray of A. <I>intermedius</I> appeared to have a significant role in that species' feeding behavior.
日本魚類学会の論文