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Fish minash
The document discusses the classification of different types of fish and shellfish. It divides shellfish into two main categories - molluscs and crustaceans. Molluscs include those with one shell like periwinkles, two shells like mussels, or no external shell like squid. Crustaceans have a hard segmented shell and joints, and include shrimp, crab and lobster. Finfish are divided into whitefish which have oils only in the liver, and oil-rich fish where oils are throughout the flesh, like salmon. Whitefish are further divided into round and flat varieties. Finfish can also be classified as demersal, living near the seabed, or pelagic swimming
Fish minash
- 1. FISH FACTS -FISH CLASSIFICATION minash shanmuganathan 28/11/11
- 2. Shellfish Shellfish are broadlydivided into two categories— molluscs and crustaceans. molluscs crustaceans
- 3. Molluscs can bedivided into three categories: Uni-valve molluscs have one shell—periwinkles, whelks and limpets. These molluscs can be found on the seashore. periwinkles whelks limpets
- 4. molluscs Bi-valve molluscs have two shells hinged at one end— mussels, oysters and scallops. mussels oysters scallops
- 5. Cephalopods Cephalopods have noouter shell, just a single internal one called a pen. Examples include squid and cuttlefish. squid cuttlefish
- 6. Crustaceans Crustaceans are mobilecreatures with hard, segmented shells and flexible joints. Examples include prawns, shrimp, crab and lobster. lobster shrimp prawns crab
- 7. Finfish Finfish aredivided into whitefish and oil-rich fish. oil-rich fish whitefish
- 8. Whitefish Whitefish are sometimesreferred to as "lean fish" because all the oils are contained in the liver, which is removed during gutting lean fish
- 9. Whitefish are furthersub- divided into: Round Whitefish—Examples include cod, haddock, hake and pollock. hake pollock haddock cod
- 10. Flat Whitefish Flat Whitefish—Examples include plaice, lemon sole, brill, turbot and black sole. lemon sole turbot black sole brill plaice
- 11. Cartilaginous Fish Cartilaginous Fish—Examples include ray, dogfish, shark. ray dogfish shark
- 12. Oil-Rich fish Oil-Rich fish are so called because the oils are distributed throughout the flesh of the fish. Mackerel, herring, salmon and trout are examples. herring salmon mackerel trout
- 13. Finfish, Demersal and Pelagic fish Finfish are occasionally classified in a different way— according to where they swim in the sea. Demersal fish are those which live on or near the seabed. Round and flat whitefish fall into this category. Pelagic fish swim in mid-waters or near the surface. Examples are oil-rich fish such as mackerel, herring and tuna.