Triplofusus giganteus · Fasciolariidae
How to identify a florida horse conch
Very large fusiform (spindle) shell with a tall pointed spire, prominent shoulder knobs on younger specimens, and a long anterior siphonal canal. Juveniles are bright orange; adults fade to grey or greyish-white.
- Very large size — mature shells commonly 12–24 inches
- Bright orange body (juvenile) fading to grey with age
- Prominent shoulder knobs and a long straight siphonal canal
- Family
- Fasciolariidae
- Class
- Gastropod
- Regions
- Gulf Coast · Southeast
- Habitat
- Sandy Subtidal · Grass Flats
- Best seasons
- Winter · Spring
- Collector level
- Advanced
Intact adult shells are uncommon — most beach finds are juveniles or storm-worn fragments.
Collect with care
- Adult horse conchs are apex predators; never take a live specimen and photograph rather than collect large live animals in shallow water.
- Florida law prohibits collection of live queen conchs and limits live gastropod harvest generally.
In your journal
- Measure carefully — journalling size class (juvenile / sub-adult / adult) tells the story of the beach.
- Photograph the aperture — spiral colour inside is distinctive.