Zooplankton from Massachusetts Bay. Top Calanus finmarhicus from 30-0 meters. Bottom: dominated by Sagitta elegans from 80 meters. Striking example of vertical stratification.

Peridinian plankton dominated by Peridinium, with Ceratium longipes and C. arctica. From a surface haul, magnified X 40.

Collecting plankton

Collecting plankton samples

Setting plankton net

Removing plankton bottle.

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.

Optical comparator being used for enumeration of invertebrate organisms in connection with in situ behavior studies. This instrument, which can project images on a 12-inch screen, is also used for training plankton sorters in identification of fish eggs and larvae.

Optical comparator assembly for imaging plankton. Please note microscope projection stage. The image appears on the screen in its true natural colors.

Underwater oil emission from Pan American platform "Dillon" . This oil spill began on May 18. The Coast Guard Cutter SEDGE is standing by. The oil slick was 1/4 mile wide and many miles long.

Oil spill and trash intermingled

Indication of fish kill from oil spill

Indication of fish kill from oil spill

Caption and significance unknown

Indiscriminate dumping of trash and its effect on the environment

Indiscriminate dumping of trash and its effect on the environment

Indiscriminate dumping of trash and its effect on the environment

Indiscriminate dumping of trash and its effect on the environment

Indiscriminate dumping of trash and its effect on the environment

Pollock (Theragra chalcogramma) Silver.

Drawing of pollock (Pollachius virens)

Pollock (Pollachius virens) lying on a net.

Porgy in the Woods Hole NMFS aquarium

Art work illustrating story on saving porpoises from death in tuna nets. Appeared on cover of NOAA Magazine January 1973.

Commercial tuna seiner during fishing operations.

Photograph of porpoise next to escape opening in tuna net.

Artist's concept of "backing down," a maneuver which shifts the weight, causing the back end of a tuna purse seine (net) to sink beneath the surface allowing porpoise that may be in the net to swim out over the top, while the tuna remain inside.

Diagram of method to save porpoise from accidental death in tuna nets.

Porpoise escaping tuna nets during the "backing down" process.

Dolphin at Marineland of Florida.

Atlantic bottle-nosed dolphin

Dolphins performing at Marineland of Florida

Dolphins performing at Marineland of Florida

White-bellied porpoise, common dolphin (Delphinus delphis) . Third most important species associated with tuna fishing.

Porpoise escaping tuna net during the "backing down" process.

Diagram of "backing down" process, a maneuver designed to allow porpoise to escape from the tuna purse seine.

A leaping porpoise

A leaping porpoise

A leaping porpoise

A leaping porpoise

A leaping porpoise

A leaping porpoise

Tagging porpoise

Porpoise escaping a tuna net

Scarlett prawns caught by the USBCF research vessel OREGON II during explorations for new shrimp grounds off northeastern South America. This large deepwater species is widely distributed on the continental slope between 300 and 1,000 fathoms in the Gulf of Mexico and Caribbean Sea.

Research vessel CRAWFORD at Woods Hole

Research vessel CRAWFORD at Woods Hole

Description not available.

Research vessel CRAWFORD at Woods Hole

Research vessel CRAWFORD at Woods Hole