Common name: Tongan Nassarius Snail

Scientific name: Rapa incurva (Dunker, 1852)
Nassarius vibex snail (Phrontis vibex) on the reef aquarium tank glassStrombus Luhanus snail on a reef tank

General information

The Tongan Nassarius Snail, Rapa incurva, is a small but highly beneficial scavenger for saltwater aquariums. These snails are known for their burrowing behavior, which helps to aerate the substrate and reduce the buildup of detritus. They have a distinctive elongated shell with a spiral design and can often be seen protruding their long siphons from the sand as they search for food.

Details

Recommended minimum tank volume
30 liter (7.9 gallons)
Salinity
S.G. 1.023 to 1.025
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8.1 to 8.4
Average size
10 cm (4″)
Care level
Moderate to easy
Diet
Herbivore
Reefsafe
Yes
Aggression
Peaceful
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Mollusks
    Mollusca
  3. Class
    Gastropods
    Gastropoda
  4. Order
    Neogastropods
    Neogastropoda
  5. Family
    Murex Snails
    Muricidae
  6. Genus
    Rapa Whelk
    Rapa
  7. Species
    Tongan Nassarius Snail
    Rapa incurva (Dunker, 1852)
  8. Synonyms
    Bulbus incurvus Dunker, 1852

Care

Rapa incurva is an undemanding species that adapts well to life in captivity. They thrive in tanks with a deep sand bed where they can burrow and scavenge for uneaten food and decaying matter. It's important to ensure that the tank is not overstocked with snails, as they require a sufficient amount of food to survive. Overfeeding can lead to an increase in nutrient levels, so a balance must be struck.

Reproduction

In the home aquarium, reproduction of Rapa incurva is not commonly observed. They are known to lay eggs in small capsules, but the larvae typically require specialized conditions to develop that are not usually present in the average reef tank.

Habitat

The natural habitat of the Tongan Nassarius Snail includes sandy and muddy substrates in shallow tropical waters. They are often found in areas with seagrass beds and coral rubble where they play a role in the ecosystem by consuming organic waste.