One of the top choices to pair with crayfish is the brown pencilfish. This tiny fish often hovers near the top of the tank. Their appearance is quite unique, with a sleek, thin, and elongated body.

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The funds will be used to trial a 12-week programme to repurpose some unused purpose-built koi tanks. The hatchery is expected to support up to 500 viable crayfish for release each year.