Add a little comedy gold to your tank with the Penn Plax 5 in. SpongeBob. This Spongebob ornament will add definite character to any tank. The ornament has holes for fish to swim through and hide in. It s perfect for bettas and other small fish. Penn Plax Penn-Plax is a family-owned company in operation since 1959. They specialize in creating excellent pet supplies for animals both great and small. Best known for producing pet products at affordable prices the Penn-Plax brand is synonymous with innovation and quality keeping your pet foremost in mind.