Ocean 
				Perch: This important commercial fish is not a true perch, 
				but is rather a member of the rockfish group. Also known as "sea 
				perch."
					 
					Ocean Pout: A marine fish 
				of the eelpout family found mainly in the Pacific. The flesh is 
				sweet and white and contains very few bones. Sometimes called a 
				"muttonfish."
					 
					Ocean Run: 
					Industry term 
				for a pack of random weight and size products.
					 
					Oceanic Bonito: This small 
				tuna (6 to 8 pounds) has a light-colored meat similar to 
				yellowfin. The Japanese call this fish "katsuo" and the 
				Hawaiians call it "aku."
					
Octopus: This cephalopod, related to the squid and the 
				cuttlefish, can reach 50 feet in length. It features a highly 
				flavorful meat that tends to be a bit on the rubbery side. 
				Octopus is eaten raw, boiled, pickled, sautéed, and fried.
					 
					Off Cuts 
					- Pieces of 
				fillets, often used for fish sticks. 
					 
					Omega 3: fish oil is an 
				important source of Omega 3 fatty acids;  eicosapentaenoic 
				acid (EPA) and docosahexaenoic acid (DHA). Omega 3 fatty  
				acids found in fish oil have numerous clinically proven health 
				benefits.
					 
					Omnivorous - 
					Eating all foods, both plant and flesh.
					 
					Ono: The Hawaiian name for 
				"Wahoo," a marine fish whose flesh compares favorably with 
				Albacore. It provides a moderate to high-fat flesh that is white 
				and slightly sweet. In Hawaii, "Ono" means "sweet."
					 
					Operculum - 
					This is the hard gill cover or the gill plates.
					 
					Orange Roughy: A New 
				Zealand and Australian area fish with lean, white flesh that is 
				firm and mild. Also called "Slimeheads" (by fishermen--not by 
				fish vendors). Pearly white flesh, medium texture holds together 
				well on cooking with coarse flakes. Delicate shellfish flavour. 
				Suitable for most cooking methods. This popular fish can be poached, baked, broiled, 
				or fried.
					 
					Otholiths - A 
					pair of bones in the inner ear of fish which exhibit growth 
					rings. Also called the "jewel"
					 
					Oyster: A bivalve mollusc 
				with a rough gray shell. The flesh varies from creamy beige to 
				pale gray; the flavor from salty to bland; the texture from 
				tender to firm. The Atlantic oysters otherwise known as 
				"Natives" and Eastern or American varieties are considered 
				superior to Pacific or Rock (Portuguese) Oyster varieties, 
				though a lot depends on how the oyster was cultivated in an 
				estuary, open sea or hatchery. Each location with give a 
				particular flavor. The age and feeding of the oyster will 
				determine size and texture.