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By Bob Goemans
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Family Trochidae

Trochus histrio

Reeve, 1842

Banded Trochus Snail

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean

Size: 1 inch (2.5 cm)

Natural Environment: Inhabits shallow intertidal and subtidal areas and predominantly reef flats along coastal areas that are rich in turf algae, cyanobacteria, diatoms, and detritus.

General Husbandry: There are many similar size and somewhat colored 'Trochus' snails available in the hobby, e.g., T. fenestratus, which is commanly called the Turban Snail; T. maculatus, which is sometimes called the Red Stripe Turbo Snail; and T. nigropunctatus called the the Black-spotted Topshell to name but a few. Its also far smaller than T. niloticus, which can get as large as four inches and become a bulldozer.

Nevertheless, this species, T. histrio, with maroon bands on its pyramid-shaped shell and a black foot with with its underside an off white/tan color, may be the most popular with hobbyists because its an extremely good scavenger of unwanted green turf/microalgae, cyanobacteria and brown diatom algae. And because of its small size, are less apt to disturb or knock over small coral frags.

Other good points about these snails are they long lasting, in fact lasting many years in the aquarium and that they do not harmed any creatures they travel over. This makes them one of the more desired snail species in hobbyist aquariums and recommend having at least one per ten gallons. Should their diet appear to be insufficient, provide them some vegetable-based tablet foods or dried seaweed/Nori.

Taxonomy:

    Kingdom: Animalia

    Phylum: Mollusca

    Class: Gastropoda

    Order: Archaeogastropoda

    Family: Trochidae

    Genus: Trochus

FYI: Keep in mind they sensitive to salinity changes, as they are mostly very shallow intertidal water creatures, so initially acclimate as noted below.

Experience Level: Beginner

Diet: Herbivore

Temperament: Peaceful

Aquarium Environment: Reef or fish-only aquarium

Coral Safe: Yes

Fish Safe: Yes

Invertebrate Safe: Yes

Acclimation Time: Sensitive to specific gravity/salinity changes, therefore be sure to adjust the bag's water to that of the aquarium in which it will be placed by slowly adding small amounts of aquarium water to the bag every few minutes. In most cases, this process should take at least 15 minutes.

Aquarium Hardiness: Moderately hardy

Temperature Range: 72 - 83°F (22 - 28°C)

Minimum Tank Size: 20 gallons

Water Movement: WM 1 - 2

Specific Gravity: 1.023 - 1.025

pH: 8.0 - 8.4

 Trochus histrio (Banded Trochus Snail)
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