Black Sea Cucumber (LiveAquaria)
The Black Sea Cucumber, often referred to as the Black Cucumber, Black Sea Urchin, or Lollyfish, has a long black body with a few spots. It was first described as a species back in 1833, and is found in the Indo-Pacific from the Red Sea to Hawaii. It lives in the sandy bottom, often partially covered with sand.
The Black Sea Cucumber needs to be kept with peaceful tank mates. Do not overstock an aquarium with the Black Sea Cucumber. In general, keep only 3 inches of worm for every 20 gallons of water. It is very sensitive to high levels of copper-based medications and will not tolerate high nitrate levels.
It does not have tubules of Culvier, but in the wild, if it is attacked or injured, it will expel its internal organs, which can be toxic to fish. After the Black Sea Cucumber expels its internal organs, the organs should be removed immediately to prevent harm to other fish.
| Specifications |
|---|
| Species: Black Sea Cucumber (Acanthocidaris sp.) |
| Origin: Indo-Pacific (Red Sea to Hawaii) |
| Habitat: Sandy bottom, partially covered with sand |
| Size: Up to 3 inches |
| Water Requirements: Low nitrate, no copper-based treatments |
| Compatibility: Peaceful tank mates only |
FAQ
What is the ideal tank size for a Black Sea Cucumber?
A general guideline is to keep one 3-inch Black Sea Cucumber for every 20 gallons of water.
Is the Black Sea Cucumber safe for community tanks?
Yes, but only with peaceful fish. It should not be kept with aggressive or fast-swimming species.
What should I do if my Black Sea Cucumber is injured?
If injured, it may expel internal organs which are toxic. Remove the expelled organs immediately to prevent harm to other fish.
Caroline Baker –
The Black Sea Cucumber arrived healthy and stayed active in my 30-gallon tank. I keep only peaceful fish, and it’s been a calm addition. I’ve noticed it buries itself in the sand occasionally. Very sensitive to copper, so I avoid any medications. It’s a beautiful and unique addition to the tank.
Connor Bower –
I’ve had this species for two months now. It’s quiet and doesn’t disturb other fish. I make sure my water parameters are stable, especially nitrate and copper levels. It’s a bit shy at first but settles in well.
Peter Morrison –
The care instructions were clear. I followed the 3 inches per 20 gallons rule and it’s thriving. I didn’t expect it to be so active in the sand. It’s a great choice for a low-maintenance, peaceful aquarium.