Plate Fire Coral

Overview

The Plate Fire Coral (Millepora platyphylla) is a prominent hydrocoral found throughout the Indo-Pacific region. Although it resembles stony corals, it is actually a colonial hydrozoan that plays a significant role in reef-building and structural complexity.

Distribution & habitat

This species is widely distributed from the Red Sea and East Africa to northern Australia and French Polynesia. It thrives in diverse reef environments, ranging from exposed fore-reef slopes to calmer lagoonal patch reefs. Its growth form is highly adaptable, often shifting between encrusting, massive, or vertical plate-like structures depending on local water flow and hydrodynamic conditions.

Appearance

Colonies are typically characterized by broad, vertical, and often wavy plates that may resemble fans. The skeleton is generally a chamois or brownish-yellow color, frequently featuring a distinct white border along the edges. The surface is covered in a network of fine pores; larger pores house feeding polyps, while smaller pores contain specialized defensive polyps.

Biology & behavior

Like other fire corals, this species possesses potent stinging cells that can cause immediate pain and lasting skin irritation upon contact. It obtains energy through a combination of capturing plankton with its polyps and maintaining a symbiotic relationship with photosynthetic algae living within its tissues. The colony structure is sensitive to physical fragmentation, particularly in high-energy zones where strong wave action can influence its development and recruitment patterns.