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CoralSaltwaterIntermediate

Brown Encrusting Anemone

Epizoanthus paxii

Also known as: brown zoanthid

A low-light Mediterranean zoanthid that carpets rock faces in soft brown colonies.

Brown Encrusting Anemone
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© (c) Virginie Zajdel, some rights reserved (CC BY-NC) · CC-BY NC

About

The brown encrusting anemone (Epizoanthus paxii) is a colonial zoanthid native to the Mediterranean Sea, where it grows as a sessile, encrusting mat across rocky surfaces in subtropical waters. Unlike the brightly colored zoanthids that dominate the reef hobby, this species leans toward earthy brown tones, giving it a more understated appearance that actually works well in naturalistic biotope setups. In the aquarium it appreciates low light and moderate water movement, which makes placement relatively straightforward once you understand its preferences. Because it comes from subtropical rather than tropical waters, getting conditions right does require a bit more attention than with the average reef inhabitant, putting it squarely in intermediate territory rather than beginner-friendly. It is considered reef safe, so it can share a system with corals and invertebrates without posing the same chemical warfare risks that some aggressive zoanthid colonies are known for. Source material on this species is fairly limited in the hobbyist literature, which reflects how rarely it shows up in the trade compared to Indo-Pacific zoanthids. If you do come across it, it represents a genuinely uncommon opportunity to keep a piece of Mediterranean reef ecology in your tank.