Fauna
Invertebrate · GBIF taxon 7575028

Perverse Lightning Whelk

Sinistrofulgur perversum

Also known as Lightning Whelk, Left-Handed Whelk

Perverse lightning whelks are distinctive predatory sea snails recognized by their sinistral, left-opening shell spirals and dark brown zig-zag stripes resembling lightning bolts. Methodical hunters of coastal estuaries, they use the heavy edge of their shell as a wedge to pry open hard clams and oysters before inserting a long proboscis to feed. Females lay distinctive long, disc-shaped egg strings that anchor in sandy sediment and often drift ashore during winter storms.

MarinePredatorMollusk
Perverse Lightning Whelk reference1 / 2
Licensed reference(c) B. Phalan, some rights reserved (CC BY), uploaded by B. Phalan · cc-by
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & prey
  • Hard Clam
  • Eastern Oyster
  • Ribbed Mussel
Predators
  • Loggerhead Sea Turtle
  • Blue Crab
  • Gulls
ThreatsCoastal development, overcollecting of decorative shells, and habitat degradation
HabitatsShallow coastal waters, estuarine mudflats, sandbars, and seagrass beds
Life span20–30 years
Classification
  1. FamilyBusyconidae
  2. SpeciesSinistrofulgur perversum
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
  • Shell Identification: Look for the sinistral opening on the left side when holding the shell upright with the spire pointing up.
  • Observe Tide Pools: Search shallow estuaries and mudflats at low tide to spot live individuals gliding across wet sand.
  • Respect Live Mollusks: Return live whelks to the water immediately and leave occupied shells in their natural marine habitat.
Related species
Help improve the field guideSomething wrong?

Report a name, category, or profile issue for review.

Checking your Fauna account…