Freshwater Limpet
Scientific Name: Ferrissia californica
Order & Family: Hygrophila, Planorbidae
Size: 2mm to 5mm

Natural Habitat
Freshwater environments such as ponds, streams, and home aquariums, often attached to glass, rocks, or plants.
Diet & Feeding
Algae and biofilms; they graze on microscopic organic matter and diatom growth.
Behavior Patterns
Hermaphroditic; they move very slowly across surfaces using a muscular foot and can reproduce rapidly under high-nutrient conditions.
Risks & Benefits
Harmless to humans and pets; they benefit ecosystems by controlling algae growth, though they are often considered pests in aquariums due to their fast reproduction.
Identified on: 1/12/2026