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Yellow Sea Cucumber

(Colochirus robustus)

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 Quick Care Facts

• Care Level: Expert   • Temperament: Peaceful   • Maximum Size: 3"
• Diet: Omnivore (filter feeder)   • Aquarium Level: Substrate & Rocks   • Minimum Tank Size: 55 gallons
 • Reef Compatible: Yes   • Water Conditions: 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025
• Supplements: None   • Coloration: Yellow
• Origin: Indian Ocean, Western Pacific • Family: Cucumariidae   • Species: Cucumbers

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Native Habitat and Species Information

Yellow Sea Cucumber native habitat, distribution, behavior & aquarium compatibility.

The Yellow Sea Cucumber originates from the Indian Ocean and is a highly sought after specie in the aquarium trade for its bright coloration and unique appearance. Yellow Sea Cucumbers are a bright yellow color and have an elongated body with branch-like projections near its mouth. When feeding, the Yellow Sea Cucumber extends their branched feeding arms into the current to catch prey floating in the currents.

Yellow Sea Cucumbers make very attractive filter feeders for an established reef aquarium. If kept in small groups, the Yellow Sea Cucumber may spawn in the home aquarium. They may also reproduce by dividing into 2 individuals; however, this may come about due to stress, or may be a sign of good health.

Aquarium Care

How to successfully keep Yellow Sea Cucumber in the home aquarium.

The Yellow Sea Cucumber requires live rock to provide the nutrients it needs to sustain its health. It will usually find a location with moderate to strong current in which it can filter-feed plankton any other organisms from the water current.

If attacked or injured, the Yellow Sea Cucumber may release mild toxins, but due to its small size, will not pose a threat in the average sized aquarium. The Yellow Sea Cucumber is very sensitive to copper-based medications and it will not tolerate high nitrate levels.

Feeding & Nutrition

How to feed and provide proper nutrition for Yellow Sea Cucumber.

The diet of a Yellow Sea Cucumber should include liquid or dried phytoplankton and zoo-plankton. They will also benefit from the substrate being stirred regularly releasing bacteria and detritus into the water. When malnourished, they will shrink in size, and may loose feeding arms; therefore, if these signs are noticed, increase the number of feedings, and target the cucumber with the appropriate food.

More Information

Caution! Yellow Sea Cucumber have the ability to release toxins.

Caution! Yellow Sea Cucumbers have the ability to releases toxins (venom) that may kill fish in the aquarium when they are severely stressed or damaged by pump intakes or overflows. Do not keep any Yellow Sea Cucumbers with any species of fish that may pick on on the tentacles. These fish include; Butterflyfish, Large Angels, and any species that is listed not safe with invertebrates.

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