Finger Leather Coral.

Universally regarded as 100% reef safe across all major husbandry sources. Does not nip corals, anemones, or sessile invertebrates. Feeds exclusively on zooplankton and small crustaceans. Territorial toward conspecifics and similar-looking basslets, but that aggression is fish-to-fish and poses no risk to Sinularia tissue. A reliable, well-documented soft-coral companion.

Consistently rated reef safe across all commercial and hobbyist sources. Spends its day hovering in the water column picking off passing zooplankton and does not interact with sessile coral tissue at all. No documented cases of nipping leather corals. Only practical husbandry caveat is jump risk — a tight lid is required — but that has no bearing on Sinularia compatibility.

Poses zero threat to Sinularia or any coral tissue — it is a pure midwater zooplanktivore with no interest in sessile inverts. Well-documented conspecific hierarchical aggression (dominant fish systematically stress and kill subordinates) is a serious fish-keeping concern but has no bearing on leather coral compatibility. The coral is in no danger from this species.

Consensus across FishLore and Reef2Reef community spotlights is reef safe with soft corals including leather corals. Functions as a cleaning station operator, not a coral grazer. Isolated anecdotal reports of opportunistic nibbling at food placed near corals exist but are rare and not specific to Sinularia. No structural risk to leather coral tissue.

Explicitly confirmed compatible with leather corals in multiple published care guides including Coralife. Substrate-dwelling species that burrows in sand and has no interest in coral tissue. The only husbandry note is that it can disturb sand-bed coral placements when excavating — Sinularia is almost always mounted on live rock, so this does not apply in practice.