Plankton net being launched at night from the BCF research ship CHARLES H

Plankton net being launched at night from the BCF research ship CHARLES H. GILBERT by personnel of the BCF Biological Laboratory at Honolulu. The flow meter centered in the mouth of the net measures the amount of water flowing through the fine-meshed cone, and from this an estimate of the abundance of zooplankton can be made.

Photo Location: Tropical Pacific Ocean
Photo Date: 1969 Circa