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.

Scientists peered into the tank, studying their pet-turned-specimen — and discovered it was a new species. Researchers in the Czech Republic purchased a shipment of Indonesian crayfish from a ...

Each Australian redclaw crayfish caught during the research project gets an identifying label. Aquatic biologists are tracking an invasive crayfish species native to Australia that’s turned up ...