Durable Material:Fish caves for aquarium is made of environmentally friendly plastic, suitable for both freshwater and saltwater environments. The edges are polished to be smooth and burr-free, and fish tank decorations can avoid scratching the delicate fins and scales of small fish like bettas, not easily deforming or fading for long-term use, with strong durability Support Breeding:Fish tank accessories has textured surfaces and a concealed structure, creating an ideal environment for betta bubble nest building and spawning. The semi-enclosed space of the round resting spot and the hidden passage of the tunnel allow fish cave to effectively stimulate the reproductive instincts of fish, suitable for professional breeders and ordinary hobbyists Flexible Placement:Aquarium accessories is a three-piece set that can be placed flexibly; the tunnel and lotus leaf are fixed to the tank wall or bottom with suction cups, and the round resting spot can float on the water surface or be fixed in position. fish hideout for aquarium can be freely combined according to tank size and aquascape style to divide activity areas for different fish Simulate Natural Habitat:Betta fish tank accessories includes a tunnel, lotus leaf and round resting spot, highly restoring the native habitat of betta fish. The tunnel simulates underwater caves for exploration and hiding, and betta fish hammock provides a surface resting area, effectively relieving fish stress, encouraging natural behaviors such as foraging and resting, and making pets feel more secure Enhance Aesthetics:Fish tank cave features a black tunnel and round resting spot paired with a large artificial lotus leaf, with a natural and harmonious color tone that adapts to various aquascape styles. aquarium caves and hides not only meets the resting needs of fish but also serves as a decorative element to enrich the tank's layers, making the aquarium more natural and interesting