Milk Conch Snail (Macrostrombus costatus)
Formerly known as Strombus costatus or Lobatus costatus, the Milk Conch Snail is a large, peaceful herbivorous snail with a beautifully sculpted shell and subtle cream coloration. Native to Caribbean reefs and sandy seagrass beds, Milk Conchs graze on algae and detritus, helping keep your aquarium clean while adding a natural, elegant presence. Hardy and low-maintenance, they thrive in established tanks with plenty of sand to move across and are best suited for large reef or fish-only aquariums.
Quick Facts
| Category | Detail |
|---|---|
| Care Level | Easy |
| Temperament | Peaceful |
| Maximum Size | ~12 inches |
FAQ
What kind of environment does the Milk Conch Snail need to thrive?
The Milk Conch Snail thrives in established aquariums with plenty of sand for movement and access to algae and detritus. It is best suited for large reef or fish-only tanks with stable water conditions.
Is the Milk Conch Snail compatible with other aquarium inhabitants?
Yes, the Milk Conch Snail is peaceful and generally compatible with most reef and fish-only aquarium inhabitants. Avoid housing with aggressive or predatory species.
How long does it take for a Milk Conch Snail to reach its full size?
Please contact customer service

Evan Coleman –
Added a Milk Conch Snail to my 120-gallon reef tank. It’s been two months and it’s active, grazing on algae without causing any disturbances. The shell is beautiful and it fits well in the sandy substrate. Easy to care for and adds a natural look to the tank.
Gavin Watson –
I was hesitant about adding a large snail, but it’s been peaceful and effective at cleaning algae. The tank looks more natural now. Just make sure there’s enough sand for it to move around.
Madeleine Dickens –
This snail has become a regular part of my reef tank. It doesn’t interfere with fish or coral and helps maintain a clean environment. The cream color and shell shape are very appealing.