Showing measurement of length of front paw of sea otter.

Showing measurement of length of tail of sea otter.

Showing measurement of length of hind paw of sea otter.

Sea otter skull showing caries in teeth of upper jaw

Sea otter skull showing caries in teeth of upper jaw

Sea otter skull, lower and upper jaw showing caries in teeth and broken canine with worn opposing teeth.

Sea otter skull, lower and upper jaw showing caries in teeth and broken canine with worn opposing teeth.

Two sea otter hides - both juvenile

Floyd Thornton, trapper, running trapline by dugout canoe several miles above the mouth of the river. Four otters and one mink were taken on this trip.

Mr. Oscar Falk, at headworks of Aberdeen City Water Department, having tame otter sit up for food.

Seaweed Sargassum natans)

Live whelks

New rhizome growth of Thalassia transplant

Seaweed -Rhodymenia palmata

Unidentified marine algae

Unidentified marine algae

Seaweed -chondrus crispus, known as Irish moss.

Seaweed - ulva lactuca

Unidentified marine algae

Unidentified marine algae

Emptying juvenile shad from cod end of surface trawl

The taking of eggs for experimental restocking

Shad hatching boxes

Experiment to determine if shad can be "locked" over dam. Net was used to determine if fish entered the lock.

Scale of 4-year old hickory shad (Pomolobus mediocrus) showing annulus crossing circuli.

Catching shad with gill net in reseach project

Shad research - hauling in drift gill net

Shad research - removing shad from drift gill net

Cooking and packing machines at De Jean Packing Co.

Leon Hall at De Jean Packing Co. demonstrating tuna guillotine

Frank Leahy without hat. Pre-cooking tuna - testing temperature of flesh to determine if properly cooked.

Cleaning tuna at De Jean Packing Co.

Hand filling and weighing tuna cans at De Jean Packing Co.

Cecil Drake and Ed Smith at De Jean Packing Co.

23 yellowfin tuna weighing 2960 pounds at the De Jean Packing Co.

Determining age of shad from their scales to determine total age, age at first spawning, and number of times spawned.

Repairing gill net used in shad fishery

Small boat used in shad fishery - outboard amidships forward to facilitate hauling net over stern.

Small boat used in shad fishery - outboard amidships forward to facilitate hauling net over stern.

Small boat used in shad fishery - outboard amidships forward to facilitate hauling net over stern.

Shad fishing - hauling net over stern. George Washington Bridge in background.

Shad fishing - hauling net over stern. George Washington Bridge in background.

Shad fishing in brackish water

Tagging dogfish

Blood sample from a dogfish

Positive of an X-ray of the head region of a sawshark (Pristiophorus sp.). This X-ray shows expansions of the vertebrae supporting the chondrocranium.

Diver biologist launching shark cage from sport fishing boat.

Diver biologist preparing to enter shark cage from sport fishing boat.

Diver biologist preparing to enter shark cage from sport fishing boat.

Observing disposition of shark cage from sport fishing boat.