Florent's Guide To The Florida, Bahamas &

Caribbean Reefs

Milk Conch
Macrostrombus costatus
Milk Conch
Category: True Conchs
Scientific Name: Macrostrombus costatus
Synonyms: Strombus costatus, Lobatus costatus, Aliger costatus
Size: 4 to 6 in. (10 to 15 cm)  
Depth: 3-40 ft. (1-12 m)
Distribution: Caribbean, Bahamas, South Florida
Mollusca (Phylum)
└Gastropoda (Class)
 └Caenogastropoda (Subclass)
  └Littorinimorpha (Order)
   └Strombidae (Family)
    └Macrostrombus (Genus)

Gastropods
True Conchs

Milk Conch

Florida Fighting Conch

Roostertail Conch

Queen Conch



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© 2025 Florent Charpin