Range: 175 - 325 µm/sec
||William G. Hand, Patricia A. Collard and Demorest Davenport, The Effects of Temperature and Salinity Change on Swimming Rate in the Dinoflagellates, Gonyaulax and Gyrodinium, Biological Bulletin Vol. 128, No. 1 (Feb., 1965), pp. 90-101 link p.94 3rd paragraph
||"Approximately 0.4 cc. of Gonyaulax culture was pipetted into a lucite well-slide. The well was circular, with a flat bottom and vertical sides, its dimension being 8.0 mm. in diameter by 1.5 mm. deep. A coverslip was placed over the well. It was then scanned, photographed and discarded. Fifty individual pathways were recorded from such preparations and measured as described above."
||"From these preparations a mean linear velocity of 250µm/sec. (with a range from 175µm/sec. to 325µm/sec.) was obtained for the Gonyaulax cell at 20°C."