This document summarizes the classification of different types of seafood. It divides them into three main categories: molluscs, crustaceans, and finfish. Molluscs are further divided into uni-valve, bi-valve, and cephalopods. Crustaceans include prawns, shrimp, crab, and lobster. Finfish are divided into whitefish, which have oils only in the liver, and oil-rich fish, which have oils throughout the flesh. Examples are given for subclasses within each of the three main categories.

1. fish facts-fish
classification
Lewis Millard year 7 2011
Autumn

2. molluscs and
crustaceans
molluscs
Text
• Shellfish are broadly divided into two
categories
crustaceans

3. Molluscs can be divided
into three categories:
periwinkles whelks limpets
• Uni-valve molluscs have one shell—
periwinkles, whelks and limpets. These
molluscs can be found on the seashore.

4. mussels, oysters and
scallops
mussels oysters
• Bi-valve molluscs have two shells
hingedat one end
scallops

5. Cephalopods
• have no outer shell, just a single internal
one called a pen. Examples include squid
and cuttlefish.
cuttlefish. squid

6. prawns, shrimp, crab
and lobster.
lobster.
• Crustaceans are mobile creatures with crab
hard, segmented shells and flexible joints.
Examples include
shrimp
prawns

7. Finfish
oil-rich fish.
whitefish
• Finfish are divided into whitefish and oil-
rich fish.

8. whitefish
whitefish
• Whitefish are sometimes referred to as
"lean fish" because all the oils are contained
in the liver, which is removed during
gutting.

9. cod,, hake and pollock.
cod, pollock
• Whitefish are further sub-divided into:
Round Whitefish—Examples include

10. Flat Whitefish
plaice
sole brill
• Examples include plaice, lemon sole, brill,
turbot and black sole.
turbot
black sole
lemon

11. T
Cartilaginous Fish
• Examples include ray, dogfish, shark.
dogfish net shark
ray

12. Oil-Rich fish
Text
• are so called because the oils are
distributed throughout the flesh of the fish.
Mackerel, herring, salmon and trout are
examples.

13. • 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.