The Senzeal Aquarium Fish Breeder Box is made of high-quality plastic that is resistant to damage from fish or shrimp. This box features a unique transparent floating design that prevents fish from escaping, a double layer construction that saves space, and suction caps that keep the box secure. The Senzeal Aquarium Fish Breeder Box is perfect for isolating aggressive fish, injured fish, small fish, shrimp, and other marine animals.