Three Life Stages

• Juveniles (up to ~4 in): vivid bright orange body, thin lip, sharp knobs.
• Sub-adults (~4–10 in): orange fading to salmon; knobs softening.
• Adults (10–24+ in): grey to cream, thick lip, weathered surface — the classic 'horse conch' silhouette.

Distinguishing Features

• Very long, straight anterior siphonal canal
• Tall pointed spire with shoulder knobs (softer on adults)
• Aperture typically stained orange inside, especially in juveniles and sub-adults

Not to Be Confused With

Juvenile horse conchs are frequently confused with true tulips because both are orange and smooth. The horse conch has a longer siphonal canal and shoulder knobs; the true tulip has an unridged shoulder and irregular brown streaking.