Fig. 14From: Nautilus: biology, systematics, and paleobiology as viewed from 2015Acoustic transmitter results from Vanuatu, November–December 2014, Efate, and Palau July 1983. Two very different kinds of daily behavior are apparent. The Palau animals never came shallower than 100 m at night, and were highly regular with movement up at sunset and movement down at dawn. In contrast, the Vanuatu animals were less regular, and also moved into much shallower waterBack to article page