Categories
- Rocks / Plants / Sponges
- Sabellids & tube worms
- Sailfin/Velifera (in pairs)
- Scalaires (Pterophyllum spp.)
- Sea cucumbers
- Seahorses (Syngnathidae) & relatives
- Sharks, rays & relatives
- Shrimps
- Shrimps & Crayfishes
- Snails & other molluscs
- Soft Corals
- Soles & relatives
- South America
- Starfish / Brittle stars
- Stingrays
- Surgeons / Tangs (Acanthuridae)
- Swordtails/Xipho
- Syngnathidae
- Tanganyika
- Tetraodon & relatives
- Tetras (Characiformes)
- Triggerfishes (Balistidae) & relatives
- Tropical Freshwater
- Urchins
- Victoria & other lakes
- Wrasses (Labridae) & relatives
- Zoanthus / Small polyps
