Fishes appear to execute annually two great migrations. By one of these shiftings they forsake the deep water for a time, and approach the shallow shores, and by the other they return to their more concealed haunts. These movements are connected with the purposes of spawning, the fry requiring to come into life, and to spend a certain portion of their youth in situations different from those which are suited to the period of maturity. It is in obedience to these arrangements that the Cod and Haddock, the Mackerel, and others, annually leave the deeper and less accessible parts of the ocean, the region of the zoophytic tribes, and deposit their spawn within that zone of marine vegetation which fringes our coasts, extending from near the high-water mark of neap-tides to a short distance beyond the low-water mark of spring-tides. Amidst the shelter in this region afforded by the groves of arborescent fuci, the young fish were wont in comfort to spend their infancy, but since these plants have been so frequently cut down to procure materials for the manufacture of kelp, and the requisite protection withdrawn, the fisheries have greatly suffered. Many species of fish, as the Salmon, Smelt, and others, in forsaking the deep water, and approaching a suitable spawning station, leave the sea altogether for a time, ascend the rivers and their tributary streams, and, having deposited their eggs, return again to their usual haunts. Even a certain species of fish, inhabiting lakes, as the Roach, betake themselves to the tributary streams, as the most suitable places for spawning. The Goramy, of India, are stated by General Hardwicke to watch most actively the margins of the spot which they select and prepare for depositing their spawn, driving away with violence every other fish which approaches their cover. The General adds that from the time he first noticed this circumstance about one month had elapsed, when one day he saw numerous minute fishes close to the margin of the grass, on the outer side of which the parent fishes continued to pass to and fro.