To catch a fish in a marine aquarium is usually not easy: Numerous hiding places provide protection to fishes and often the aquarist has no choice but to empty the aquarium partially. If you do not succeed with a fishing net, then you can try a fish trap. If the fishes have already got used to with the first case, they can be lured with food. Crabs, snails and bristle worms can be removed with an appropriate case.
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