Biodiversity's big wet secret: the global distribution of marine biological records reveals chronic under-exploration of the deep pelagic ocean.

Background: Understanding the distribution of marine biodiversity is a crucial first step towards the effective and sustainable management of marine ecosystems. Recent efforts to collate location records from marine surveys enable us to assemble a global picture of recorded marine biodiversity. They also effectively highlight gaps in our knowledge of particular marine regions.

Telemetered cephalopod energetics: swimming, soaring, and blimping.

Cephalopods are uniquely suited to field energetic studies. Their hollow mantles that pump water for respiration and jetting also can accommodate differential transducer-transmitters. These transmitters indicate pressure-flow power output, which can be calibrated against oxygen consumption by swim-tunnel respirometry.