The Natural History of Pliny, Volume 2 (of 6)

Chapter 262: CHAP. 75.—FISHES WHICH ARE BOTH OVIPAROUS AND VIVIPAROUS.

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The volume assembles an encyclopedic survey of the known world and its living inhabitants, moving from detailed regional geography and descriptions of seas, rivers, islands, and peoples to extended treatments of humanity, its generation, anatomy, and the origins and inventions of arts. Subsequent books catalog terrestrial animals—their habits, capture, and uses—followed by comprehensive observations on fish and marine creatures, their sizes and behaviors. Accounts mix naturalistic description, reported marvels, medicinal uses derived from animals, and travel and secondhand reports, organized as topical chapters intended as a practical compendium of natural and human phenomena.

CHAP. 75.—FISHES WHICH ARE BOTH OVIPAROUS AND VIVIPAROUS.

The torpedo is known to have as many as eighty young ones. It produces within itself 2802 very soft eggs, which it then transfers to another place in the uterus, and from that part ejects them. The same is the case with all those fish to which we have given the name of cartilaginous; hence it is, that these alone of all the fishes are at once viviparous and oviparous. The male silurus 2803 is the only fish among them all that watches the eggs after they are brought forth, often for as long a period as fifty days, that they may not be devoured by other fish. The females of other kinds bring forth their eggs in the course of three days, if the male has only touched them.