Fauna
Invertebrate

Seminole Ramshorn

Planorbella duryi

Also known as Florida Ramshorn, Seminole Rams-Horn Snail, Dury's Ramshorn

Seminole ramshorns glide along submersed aquatic vegetation, grazing films of algae and decaying plant tissues with a fine rasplike radula. Equipped with a simple lung and iron-rich red hemolymph, these resilient pulmonate snails frequently surface to trap a bubble of atmospheric air beneath their shell. Although naturally confined to Florida's sluggish freshwater systems, captive breeding has established colorful domestic lineages in home aquaria worldwide.

AquaticFreshwaterHerbivorous
Seminole Ramshorn reference1 / 3
(c) Parsa Fard, some rights reserved (CC BY), uploaded by Parsa Fard · cc-by
—observations
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—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyMicroscopic algae, Bacterial biofilm, Decaying submerged leaves
Predators
  • Florida softshell turtle
  • Redear sunfish
  • Freshwater crayfish
ThreatsAgricultural runoff, aquatic habitat degradation, and invasive competitors
HabitatsSprings, slow-flowing rivers, marshes, canals, and ponds
Life span1–2 years
Classification
  1. FamilyPlanorbidae
  2. GenusPlanorbella
  3. SpeciesPlanorbella duryi
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Wild Observation: Look along submerged stems of spatterdock and hydrilla in calm Florida spring runs.
  • Aquarium Care: Avoid releasing captive specimens into non-native waterways to prevent invasive spread.
Related species
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