Note 2259 — BOOK IX. THE NATURAL HISTORY OF FISHES.
John Bostock translation
“Incertâ de causâ.” Pintianus, following the similar account given by Aristotle, Hist. Anim. B. ix. c. 48, takes the words to mean “temere,” “hap-hazard,” “without any motive whatever.” Ajasson says that it is their eager pursuit of small fishes which sometimes betrays them into leaping on shore, and occasionally, the pain caused by attacks of parasitical sea-insects and other animals.