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N.Z. Native marine aquarium clean up crew (CUC)


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A Clean-Up Crew for Your Aquarium

The “clean-up crew” is a term used to describe the various small invertebrates that in nature clear up decomposing matter, algae growths and sift through the sand bed to help promote a healthy system.

The most commonly used are hermit crabs, turbinaria snails, and glass shrimp though there are a variety of other snails, limpets, brittle stars, etc.

One important factor to consider is the type of habitat you are trying to replicate and the compatibility of live stock in the tank. Leatherjackets, Puffers or wrasses can predate on hard and soft bodied invertebrates so you may be limited to animals with a hard shell; large snails and hermit crabs

You also need to ensure there is enough food in the tank to sustain them, a newly set up tank may support a few shrimp or hermit crabs as these can be fed easily. Whereas grazing snails will possibly starve until the algae levels are up in the tank, unless you can supplement feed them, some clean-up crew members require a sandbed for survival and a new bed may not have enough nutrients required to support them.

It's Important to check on invertebrates to ensure that they are still alive, a good rule is to keep track of any livestock you put in the tank as dead animals can quickly pollute the water in your tank.

Sometimes the clean up crew can predate on each other, for example Hermit crabs are known to kill snails when they need a new home so adding spare empty shells will help solve the problem.

Below is a small selection of critters that can help in the maintenance of your captive environment.

Brown Creeper

Zeacumantus subcarinatus

Diet: Coraline and filamentous algae

Brown Bubble Snail

Bulla quoyii

Diet: Ulva, Sea lettuce,diatomaceous film and filamentous algae

White Bubble Snail

Haminoea zelandiae, colour variable

Diet: Ulva, Sea lettuce,diatomaceous film and filamentous green algae.

Black Spotted Topshell

Diloma melagraphia atheops

Diet: Grazes on algal film and sediment deposits, also a detritus feeder

Cats eye Snail

Turbo smaragdus

Diet: Foliaceous algae and macrophytes

Cooks Turban

Cookia sulcata

Diet: Foliaceous algae and Ecklonia radiata

Turret Shell

Maoriculpus rosea

Diet: Deposit feeder, filters sediment.

Glass Shrimp

Palaemon affinis

Diet: Almost anything, good for cleaning up uneaten food.

Brittle Starfish

Brittle Starfish

Diet: sediment deposits detritus feeder

Sea cucumber

Stichopus mollis

Sea Cucumber are detritus feeders, they are very good at keeping a sand bed clean but be careful they have enough food. They grow to 18-20 cm.

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