Gosear Resin Aquarium Fish Tank Landscape Simulation Dinosaur Head Bone Skull Decoration Ornament Accessories Resin Aquarium Fish Tank Landscape Simulation Dinosaur Head Bone Skull Decoration Ornament Accessories Skull design adds underwater adventures feel to your aquarium Made of resin, insoluble in water and non-toxic to fish or water plants Fish can hide or pass through the holes for fun Smooth edges, no harm to your fish