The inhabitants of Comacchio seem to have a very correct idea of the natural history of this rather mysterious fish. They know exactly the time when the animal breeds, which, as well as the question how it breeds, has in Britain been long a source of controversy, as I have already shown; and these shrewd people know very well when the fry may be expected to leave the sea and perform their _montee_. They can measure the numbers, or rather estimate the quantity, of young fish as they ascend into the lagoon, and consequently are in a position to know what the produce will eventually be, as also the amount of food necessary to be provided, for the fish-farmers of Comacchio do not expect to fatten their animals out of nothing. However, they go about this in a very economic way, for the same water that grows the fish also grows the food on which they are fed. This is chiefly the aquadelle, a tiny little fish which is contained in the lakes in great numbers, and which, in its turn, finds food in the insect and vegetable world of the lagoons. Other fish are bred as well as the eel—viz. mullet, plaice, etc. On the 2d day of February the year of Comacchio may be said to begin, for at that time the _montee_ commences, when may be seen ascending up the Reno and Volano mouths of the Po from the Adriatic a great series of wisps, apparently composed of threads, but in reality young eels; and as soon as one lot enters, the rest, with a sheeplike instinct, follow their leader, and hundreds of thousands pass annually from the sea to the waters of the lagoon, which can be so regulated as in places to be either salt or fresh as required. Various operations connected with the working of the fisheries keep the people in employment from the time the entrance-sluices are closed, at the end of April, till the commencement of the great harvest of eel-culture, which lasts from the beginning of August till December. The manner of life of the people of Comacchio will be found detailed under the title of “The Fisher Folks” in another part of this volume. The engraving represents one of the fishing-places of the lagoon.