【Material】Made of 3D printed PLA material, ideal for aquarium use. The smooth surface will not harm fish fins. The natural design provides a comfortable and safe resting place and hiding spot for fish. 【Size】Available in two sizes: S (7 x 7 x 4 cm) and M (10 x 10 x 5.4 cm). 【Comfortable Resting Place】Provides a sheltered hiding and resting place for fish, an ideal resting cave in the aquarium. 【Feeding Ring】Floating feeding ring, specially designed for floating fish food. It stays on the surface regardless of water level fluctuations, making feeding convenient, reducing food waste, improving water quality, and thus promoting fish health. 【Floating Decoration】Floats in the water, gently swaying with the current, adding a unique visual attraction to the aquarium. Small fish and shrimp can swim and play freely in it. Small holes on the side walls allow for easy observation of small ornamental fish, tropical fish, shrimp, and snails; the open design ensures good water circulation. This versatile aquarium toy serves multiple purposes: it is a safe resting place, an effective feeding ring, and can also be used as a hammock, exploration toy, and habitat – perfect for bettas, shrimp, and small fish. It enriches the aquarium landscape, helps reduce fish stress, and maintains their health and vitality.