Other fishes,2391 again, are unable to bear the heat of summer, and lie concealed during the sixty days of the hottest weather of midsummer; such, for instance, as the glaucus,2392 the asellus,2393 and the dorade.2394 Among the river-fish, the silurus2395 is affected by the rising of the Dog-star, and at other times it is always sent to sleep by thunder. The same is also believed to be the case with the sea-fish called cyprinus.2396 In addition to this, the whole sea is sensible2397 of the rising of this star, a thing which is more especially to be observed in the Bosporus: for there sea-weeds and fish are seen floating on the surface, all of which have been thrown up from the bottom.