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Updated: 31 Oct 02

Birds | Fish | Invertebrates

Fish
The fish species listed below are some of those caught in the River Thames between Fulham and Tilbury since 1964. The list is not necessarily indicative of the species that are currently present. The fish include freshwater, estuarine, and marine fish.


Fish
Allis Shad
Barbel
Bass
Bleak
Brown Trout
Bullhead
Chub
Common Carp
Crucian Carp
Dace
Flounder

Goldfish
Grayling
Grey Mullet
Gudgeon
Lampern
Minnow
Perch
Pike
Rainbow Trout
Roach
Rudd
Ruff

Salmon
Sea Lamprey
Silver Eel
Smelt
Stone Loach
Tench
Ten-spined Stickleback
Three-spined Stickleback
Twaite Shad
Yellow Eel

Birds
Invertebrates



MINNOW


MINNOW

This lively inquisitive little fish is found almost everywhere in the British Isles - provided there is clean water and a sandy or gravelly bottom. Its back is dark green or brown - bordered on the sides with a golden stripe; the rest is silvery grey dappled with dark spots and bars. The scales are very small and numerous. In the Spring the males have a bright red belly. Minnows move about in small shoals - feeding on vegetable matter and minute creatures. It seldom grows to more than four inches in length.

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STONE LOACH


STONE LOACH

This small slender fish is found in clear water almost everywhere in the British Isles - except Northern Scotland. Usually it hides under stones (whence its name) - waiting for the small creatures on which it feeds. Its colour is grey-greenish or brownish - with irregular darker blotches; the belly is white. There are six barbels round its mouth - the two at the corners of the jaws being longer than the other four. The scales and eyes are small - the fins dotted or striped. Average length three to four inches.

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GRAYLING


GRAYLING

The small adipose fin near the tail shows this fish to be a member of the Salmon family. It is immediately recognisable by the very large striped dorsal fin - and the longitudinal thin grey lines on the sides of the body. It is locally distributed in Britain - in clear streamy rivers with deep pools and swift shallows. It feeds on flies - insect larvae - worms and small crustaceans. It is a Spring spawner - unlike other Salmonids.

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BROWN TROUT


BROWN TROUT

Despite its name - it can be of almost every colour - from silver (Sea Trout) to black - with a dark back and slighter belly; the sides are covered with spots and rings of many colours; the sail is not forked. Found all over the British Isles in lakes or rivers - where the water is clean and well aerated. It feeds on insects and larvae - shellfish - worms and small fish. According to the locality, adult Trout may weigh from a few ounces to several pounds.

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RAINBOW TROUT


RAINBOW TROUT

This beautiful species of Trout was introduced in Europe from North America - and is found mostly in a few land-locked clear lakes in several parts of the British Isles. It has mostly not remained in the rivers - and has also disappeared mysteriously from many lakes. It can be distinguished from the Brown Trout by the red 'rainbow' band on its sides - with red blotches; the tail is slightly forked - and covered with many dark spots.

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SMELT


SMELT

The adipose finlet near the sail shows that this slender sea fish is related to the Salmon family. The back is greenish - the sides silvery - with a very short and incomplete lateral line. The large mouth reveals the Smelt as a voracious fish; it feeds on small fish, worms, prawns and shrimps. It enters estuaries in the Spring - to spawn in fresh or brackish water - provided there is no pollution. Not to be confused with the Sand Smelt (Atherina) - with two dorsal fins. The Smelt usually weighs about half a pound.

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SALMON


SALMON

The Salmon may be found in all unpolluted rivers of the British Isles - provided they are connected with the sea. It is silvery - with a dark back and many small black spots on the sides above the lateral line; it has a soft dorsal fin and a small adipose fin near the tail. The Salmon is born in the rivers and usually spends the first two years of its life there; then it descends to the sea where it grows large feeding on fish - returning later to the river to spawn.

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TWAITE SHAD


TWAITE SHAD

More common than the Allis Shad - with the same appearance and habits - though much smaller. Even when adult it retains a row of dark spots on the upper part of the body. There is no lateral line; the scales are smaller and firmer (58 to 66 in a row from gills to tail) - and gillrakers are short and stiff - numbering from 30 to 45; these characteristics distinguish the Twaite from the Allis Shad.

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ALLIS SHAD


ALLIS SHAD

It has a dark back and a blackish spot on the shoulder. It has no lateral line; there are from 72 so 86 scales from gills to sail - and numerous fine gillrakers (from 60 to 120) visible on lifting the gill-covers. It is a sea fish - coming into large clean rivers to spawn; the year-old fish - which has a row of dark blotches on the upper part of each side of the body - emigrates to the sea. The maximum length is 2 1/2 feet - maximum weight about 8 lbs.

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PIKE


PIKE

The "freshwater shark" is found almost everywhere in the British Isles living alone - preferably near weeds - where its immobility and marbled coloration of green and yellow render it almost invisible. It has a large mouth full of sharp teeth - a single dorsal fin set back near the sail - and small-looking scales. It feeds voraciously on fish - frogs - water birds - rats - voles - and also worms and insect larvae.

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PERCH


PERCH

This handsome fish is found everywhere in the British Isles in rivers, lakes and ponds. Its skin is rough - olive green in colour - shading into yellow and white - with from five to seven dark vertical stripes. There are two dorsal fins - the first spiky and with a black spot - the second soft; sharp spines are also present at the beginning of the lower fins - which are bright red. The Perch feeds on small fish - worms - shellfish and aquatic insects.

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Originally Illustrated by E V Petts and described by A F Magri Macmahon for Brooke Bond as part of their educational tea cards series.

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