Porites compressa (Finger Coral) Propagation Guide

Propagating the branching finger coral Porites compressa by cutting branch tips and gluing them to plugs, plus the genus's reproduction and frag-care notes.

Overview

Porites compressa is a small-polyp stony coral in the family Poritidae. Like other Porites it has a finger-like morphology, growing as branching colonies with very small polyps, and it harbours symbiotic zooxanthellae in its tissues. Porites are notably halotolerant, withstanding wide daily swings in salinity in the wild, which reflects their general hardiness as a genus.

Reproductive Mode

Porites colonies disperse through planktonic larvae that settle on the substrate, although the genus is also known to propagate vegetatively. Detached fragments that remain alive can establish new colonies further down the reef, which is the natural process the aquarist mirrors when fragging a branching species like compressa.

Fragging / Asexual Propagation

Because compressa is a branching Porites, propagation is straightforward: cut a finger-like branch from a healthy colony, then mount the cutting on a frag plug or piece of rock. Dry the base of the frag and the plug so the bond holds, add a couple of dabs of cyanoacrylate glue, secure the piece, and place it in low flow until the glue cures. The frag then encrusts the plug and resumes branching.

Conditions for Propagation

As a photosynthetic SPS, a compressa frag needs stable reef parameters, moderate to high light, and good water movement to keep its small polyps clean and extended. Frags taken from vigorous colonies attach and grow back fastest. Although hardy, Porites growth is gradual, so allow time before the frag visibly thickens.

Common Challenges

The small polyps and smooth surface make tissue recession hard to spot early, so inspect new frags closely. Maintaining strong flow helps shed mucus and discourages algae from settling on freshly cut tissue while it heals onto the plug.