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Open brain coral (Trachyphyllia geoffroyi)PL-000005
PhotographedAug 24, 2026

PL-000005Available

Neon open brain

Trachyphyllia geoffroyi

Red open brain

¥2,150

Wild-type colour we have not managed to reproduce since.

Origin
Aquacultured
Source
PetLive raceway 3
Acquired
Jan 19, 2026
Size class
medium
Difficulty
Intermediate
Temperature
24–26 °C
Lighting
Medium
Flow
Low
KH
8.4 dKH
Ca / Mg
430 / 1350

Gallery

  • Wall hammer, nine heads — Euphyllia ancora
    Under white light, the day it was listed.White light
  • Cream torch, single head — Euphyllia glabrescens
    The same animal under heavy actinic.Actinic
  • Red rim open brain — Trachyphyllia geoffroyi
    On the display floor, mixed lighting.Mixed light

Growth log

Measured here, not estimated. A record with no history is a listing that outlived its sale.

Oct 6, 2025
48 mmCut from the mother colony and glued to its plug.
Feb 3, 2026
57 mmEncrusted over the plug edge — it has accepted the move.
May 29, 2026
69 mmFirst full head split under our lighting.
Aug 20, 2026
76 mmMeasured before photography for the listing.

Story

Sits on sand, not rock. Fed mysis twice a week for a year; the green has gone from olive to this without any change in lighting.