Diver biologist entering shark cage from sport fishing boat.

Diver biologist inside of shark cage

Taking photos from shark cage

Blue shark (Prionace glauca) and banded rudderfish. M type dart tag is at base of dorsal fin. The tag was applied by a research biologist.

Male blue shark (Prionace glauca) as seen from shark cage

Mako shark caught on rigged eel

Biologist applying M type dart tag to sandbar shark (Carcharhinus milberti)

Applying a Roto-tag with special applicator pliers

Biologist preparing to tag blue shark (Prionace glauca)

Casey and assistants bringing shark aboard in slings for tagging

Captive sandbar shark in sling for tagging

Sorting trawl catch predominantly of blue crabs and small fish of FWS research vessel

Preparing to dump cod end of trawl net on deck of FWS research vessel

Sorting trawl catch of blue crabs and small fish on deck of FWS research vessel

Blue crab

Blue crab

Clam dredge being hauled aboard

Fresh shrimp in wooden boxes before being cooked and canned

Fresh boiled shrimp in trays prior to canning

Indian boy picking shrimp in fish house

Women on assembly line at shrimp processing facility

Women on assembly line at shrimp processing plant

Men and women on assembly line at shrimp processing plant

Indian woman picking shrimp in fish house

Edible or blue mussels (Mytilus edulis)

Close-up view showing mussels attached to crow-foot bar hooks

Fresh-water mussels (Anodonta oregonensis)

Fresh-water mussel (lampsilis luteola) on the half shell

Structure of a fresh-water mussel drawn by George LeFevre and W. C. Curtis. This mussel is a white heel-spitter (Symphynota complanata).

Fresh-water mussels (lampsilis anodontoides). A series of shells showing relative ages.

Edible or blue mussels (Mytilus edulis)

Windrows of mussels on the beach following a January northeaster storm.

Various species of mussels and clams

Shellfish research - cultureing algae as shellfish food

Emptying trawl net on deck with catch of crabs and small fish

Sorting trawl catch of blue crabs and small fish on deck of FWS research vessel

Sorting trawl catch of blue crabs and small fish on deck of FWS research vessel

Coonstripe shrimp

Pink shrimp

Southern shrimp (Penaeus setiferus) from drawing by J. H. Emerton

Royal red shrimp (Hymenopenaeus robustus)

White shrimp (Penaeus setiferus)

Adult pink shrimp (Penaeus duorarum)

Diagram of shrimp physiology

Brown shrimp drawing (Penaeus azteca)

Royal red shrimp drawing (Hymenopenaeus robustus). drawing by G. T. Sundstrom.

White shrimp drawing (Penaeus setiferus)

Pink shrimp drawing (Penaeus duorarum)

Drawing of first nauplius of brown shrimp (Peneaeus aztecus), first stage after hatching. Circle represents the head of a pin.

Drawing of first postlarva of brown shrimp (Peneaeus aztecus), about twelve days after hatching. Circle represents the head of a pin.