When Dr. Morton said there were abyssal fish in the lagoon, I knew why they'd be there.
Core-takers had been dropped to get samplings of abyssal mud.
Such a rock is necessarily oceanic; but more than this, it is abyssal.
In their morphological characters they gradually approach the pelagic forms upwards and the abyssal downwards.
Dimya; recent in abyssal depths and fossil ...