Penn Plax Ariel Stretching On D&eacute;cor Rocks Bring the magical world of Disney into your home. From the Disney animated feature, The Little Mermaid. Vibrantly colored, hand-painted Aquarium ornament 1.75" L X 2.8" W X 3.1" H. Safe for freshwater and saltwater aquariums. Provides shelter and hiding places for fish to help reduce stress.