Water Beetles

Water Beetles

Nearly all water beetles are carnivorous, and it is very unlikely that they’ll find their way into the aquarium if reasonable care is taken to

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Thread Worm

Thread Worm

There are numerous different kinds of thread worms. They’re recognised as hair-like creatures, wriggling their way about the tank with eel-like motions of the body.

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Leeches

Leeches

Again we have a pest that’s not truly an enemy. On rare occasions leeches might attach themselves to fish, but this is the exception instead

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Hydra

Hydra

The hydra is only dangerous to very little fish. It is a low type of life, a polyp, that devours fish up to about 3/16

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Flat Worm

Flat Worm

Flat worms are generally between 1/8 to 3/16 -in. long, and coloured a pale grey, comparable to the body of a garden snail. They could

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