The Duck Marine 5-in-1 Toilet Liquid Cleaner would be a great fit for marine theme bathrooms.
Duck Active Clean Toilet Rim Block, Foaming Toilet Bowl Cleaner, Long-lasting Fragrance, Marine, Pack of 8 (8 x 38.6g)
Duck Fresh Discs Toilet Cleaner Starter Kits, Fights Stains That Harbour Germs, Prevents Limescale Build Up, Marine, Starter Kit (1 Holder + 3 Refill Tubes)
Duck Fresh Discs Toilet Cleaner Refill Twin Pack, Fights Stains That Harbour Germs, Prevents Limescale Build Up, Marine Fragrance, Pack of 3 (Total of 6 Refill Tubes)
Duck Marine 5-in-1 Toilet Liquid Cleaner, 750ml PACK OF 4
Bottom Marine Organism Toilet Seat Cover Toilet Lid Cover & Tank Cover Set 2 Pcs Dustproof Durable Universal Fit for Bathroom Decoration Toilet Cover Set
HAHAFU Underwater World Blue Marine Life Toilet Decorative 2-Piece Set With All-Over Print,Stretchable Toilet Lid Cover, Soft Elastic Fabric For Home Decoration
