Saltwater Aquarium Snails for Marine Reef Aquariums: Keyhole Limpet Snail
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Keyhole Limpet Snail
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Keyhole Limpet Snail (Megathura crenulata)
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Quick Stats

Care Level Easy
Temperament Peaceful
Color Form Black, Tan
Diet Herbivore
Reef Compatible With Caution
Water Conditions 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025
Max. Size 3"
Origin Eastern Pacific
Family Fisurellidae
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Overview

The Keyhole Limpet Snail is a common herbivore that originates within the shallow waters of the Eastern Pacific. They have a white and tan mottled oval shell, and a large black mantle that will almost engulf the shell when fully expanded. These limpets have a circular opening at the apical end of the shell, which serves both as an excurrent and anal opening. They do not have the ability to hide within the shell.

The Keyhole Limpet Snail prefers an established aquarium with live rock and plenty of microalgae from which they can graze. These Limpets are sensitive to high nitrate levels and copper-based medications. They are a great addition to the reef aquarium for algae control, and will not bother sessile invertebrates.

The breeding habits of these Limpets have not been observed in captivity.

The Keyhole Limpet Snail feeds upon all forms of microalgae in the aquarium. If insufficient algae is present, supplement their diet with dried seaweed.

Use caution when considering placing Limpet snails in reef aquariums that contain SPS corals as these snails have been known to sometimes graze on certain species of Acropora, Montipora and other similar species.

Approximate Purchase Size: 1" to 2-1/2"

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