Show vlades of the sea though no sharp line of separation can be grawn drawn marine fishes are rough ly divided for or convenience into three categories shore fish which habitual ly coast lines and rarely descend to a greater depth than fathoms pelagic pelage fishes which inhabit the open sea ses most of them spawning there also and the deep sea fishes which live where the influence of licht lichi and surface temperature is but little felt the shore fishes according to heilprin HeU Hell prin number upwards of species their northern granbe extends to or beyond the eighty third thira parallel of latitude but bat in the southern himl bimi sphere they agrenot known to go beyond the sitt sixtieth leth parallel inthe C dif ferent zones these fish are largely idea idab aleal in both the tee atlantic and basins as welt well as on the opposite eide of these basins Trop tropical leAl waters however produce a greater ogreater abundance sad end diversity of forms forma than those of temperate re rex ions while the reefs give to the ac and indian oceans more species d than the atlantic our y er y meagre knowledge of the vol bisbe is sufficient to Ind indicate leate um that me the OBIO her ber of such types asvery limited they diminish rapidly from the equator and become rare ram beyond the fortieth paral lel lei of the deep sea ashes gunther enumerates upward of 50 forms supposed to have bees been obtained from depths exceeding 1000 fathoms 29 from depths exceeding 2000 fathoms and nine from 2500 fathoms ja thoms species specie have shave since been obtained one am from the extreme depth of et 1 fathoms land and water |