Scleronephthya gracillima (Strawberry Tree Coral): Propagation Guide

Why the azooxanthellate strawberry tree coral Scleronephthya gracillima is almost never propagated in captivity, with its taxonomy, distribution and feeding-dependent biology.

Overview

Scleronephthya gracillima is a soft coral of the family Nephtheidae. The genus Scleronephthya was established by Studer in 1887 and belongs to the octocoral lineage; recognised species occur in South-East Asia and Australia. In the aquarium trade colonies of this group are sold as bright pink-red strawberry corals.

Like its relatives in Nephtheidae, this coral is azooxanthellate and carnivorous: polyps emerge to capture food rather than relying on light. That dependence on a continuous supply of plankton is the reason colonies rarely survive long enough in captivity to be propagated.

Reproductive Mode

As an octocoral in Nephtheidae, Scleronephthya reproduces sexually in the wild. The whitelisted sources for this genus are limited and do not document a specific captive asexual propagation method, so its reproduction should be described as wild biology rather than a home technique.

Fragging / Asexual Propagation

No source-backed fragging protocol exists for Scleronephthya gracillima. Because the species depends on constant feeding and is exceptionally hard to maintain, cutting a colony is unlikely to yield viable, recovering fragments. The honest position is that this coral is effectively not propagated in home aquaria.

Feeding & Conditions for Propagation

Sustaining this coral at all requires the non-photosynthetic feeding regime described by Reef Builders: varied particle sizes from phytoplankton through rotifers and copepods, offered daily and multiple times per day, with strong current comparable to a stony-coral system. Only under such conditions could a colony accumulate the energy that any growth or tissue recovery would demand.