By Bob Goemans
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Family Polyclinidae

Aplidium crateriferum

(Savigny, 1816)

Crater Sea Squirt

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean

Natural Environment: Inhabits areas under rocks on reef slopes.

Aquarium Suitability: Not collected for the home aquarium trade.

Yet may, yet extremely rarely, inadvertently occur on coral specimens/live rock from areas of their collection.

Requires special attention to feeding requirements. For those that want to maintain them, they require numerous feedings per day of live and/or preserved commercial phytoplankton/zooplankton products or that of animal and plant powders that produce suspended products in the bulk water and/or bacteria laden waters.

Proper placement is also quite important. Generally, most prefer low light and do better with indirect light and gentle water movement.

Besides being difficult to maintain, they have a very short life span, usually about one year and sometimes far less. Only those willing to provide for their demanding level of care should attempt keeping them in closed systems. Actually, 99.9% should be left in the wild.


    Kingdom: Animalia

    Phylum: Chordata

    Class: Ascidiacea

    Order: Aplousobranchia

    Family: Polyclinidae

    Genus: Aplidium

FYI: Shown here for identification only.

 Aplidium crateriferum (Crater Sea Squirt)
Photo © Bob Fenner
Eudistoma reginum Aplidium tabascum
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