Note
Meso- and bathypelagic fishes are conspicuous components of the 'deep scattering layer' (DSL) of the world oceans. These ichthyofauna interact with resident demersal fauna at seamounts in several ways: (1) horizontontal impingement by non- or weak vertical migrators (mainly deep meso- and bathypelagic forms); (2) impingement of mesopelagic vertical migrators during migratation, including topograhic trapping; (3) adoption of a benthopelagic lifestyle over seamounts by large, adult pelagic fishes; and (4) adoption of a pseudoceanic lifestyle by species from primarily pelagic families, including endemism and active aggregation, the latter being corroborated by acoustic evidence.