Nephthyigorgia (Chili Coral): Propagation Guide

Propagation overview of the chili coral Nephthyigorgia, the most approachable non-photosynthetic soft coral, including its biology, daily feeding needs and cautious fragmentation outlook.

Overview

Nephthyigorgia, traded as the chili coral or chili sponge, is a non-photosynthetic octocoral now placed in its own monotypic family, having previously been associated with Nidaliidae. According to Julian Sprung writing on Reef Builders, it is usually dark reddish, sometimes orange, with a few finger-like lobes or the look of a small hand, and polyps that retract into small bumps to give a bumpy texture; it bears large, obvious spiny sclerites.

It was once a common import from Indonesia but is seldom seen now, since hobby interest favours corals with symbiotic zooxanthellae. Reef Builders recommends it as the starting point for anyone wanting to keep this kind of coral, with care similar to easier gorgonians, although it must be fed every day.

Reproductive Mode

As an octocoral, Nephthyigorgia reproduces sexually in the wild. The whitelisted sources do not document a specific captive sexual-spawning record, so propagation in the hobby is approached through cutting rather than through larvae.

Fragging / Asexual Propagation

Among non-photosynthetic soft corals, the chili coral is the most forgiving and is reported to be kept with care similar to the easier gorgonians, which makes a fragment from a cut lobe more plausible than with Dendronephthya. The whitelisted sources do not give a step-by-step protocol, so any cutting should be conservative: remove a single finger-like lobe, attach it gently in strong flow, and continue daily feeding while it heals. Success still depends on maintaining the colony, which is the harder part.

Feeding & Conditions for Propagation

Reef Builders frames chili coral feeding as daily and continuous: it must capture and digest different types of plankton from the water column. Non-photosynthetic corals in general benefit from varied particle sizes and current as strong as that used on a stony-coral tank. A fragment will only knit and grow if this feeding and flow are sustained.