A Field Guide to Red Sea Coral: Hard Corals, Soft Corals, and Sea Fans

Snorkel or dive a Red Sea reef and you're surrounded by coral — but how much of it can you actually name? Beyond "pretty," the reef is a whole community of different coral types, each with its own form, role, and story. Learning to tell hard corals from soft corals and sea fans transforms a swim from a blur of colour into a rich, readable landscape. Here's a friendly field guide to the corals you'll see.

The short answer: Red Sea reefs are built from hard corals (the stony reef-builders), decorated with soft corals (flexible, swaying, often vividly coloured), and adorned with sea fans and gorgonians (fan-shaped filter feeders). Each plays a different role in the reef.

First, what coral actually is

Here's the surprise that delights most people: coral is an animal, not a plant or rock. Each coral is a colony of tiny creatures called polyps, related to anemones and jellyfish. Many corals partner with microscopic algae living in their tissue, which photosynthesise and give the coral much of its food and colour. Understanding that coral is alive — and slow-growing — is the key to appreciating and protecting it.

Hard corals: the reef-builders

Hard (stony) corals are the architects of the reef. Their polyps secrete a hard limestone skeleton, and over centuries these skeletons build up into the reef structure itself. Look for them in many forms:

• Branching corals (like staghorn) — antler-like branches.
• Table corals — flat, table-top plates extending outward.
• Brain corals — rounded boulders with maze-like, brain-like grooves.
• Massive/boulder corals — large, solid domes that grow very slowly.
• Plate and encrusting corals — sheets and crusts over the reef.

Hard corals are the foundation of the whole ecosystem — without them, there's no reef. They're also the most vulnerable to bleaching and damage, so they need our care most.

Soft corals: the reef's decoration

Soft corals lack a hard skeleton, instead having flexible, often tree-like or finger-like bodies that sway in the current. The Red Sea is famous for its spectacular soft corals, which drape walls and drop-offs in vivid reds, pinks, oranges, purples, and whites — at their most glorious when the current is running and they puff up to feed. They don't build the reef like hard corals, but they make it dazzlingly beautiful and provide shelter for countless creatures. The soft-coral-covered walls of sites like Panorama and the offshore reefs are a Red Sea signature.

Sea fans and gorgonians

Sea fans (a type of gorgonian) are a particular delight — flat, intricate, fan-shaped structures that grow across the current to filter food from the water. They can be large and beautifully branched, often hosting tiny creatures among their lattice. Look for them on walls and in current-swept areas, oriented to catch the flow. They add architecture and elegance to the reef and are a favourite of photographers.

Other reef life to spot

The reef community includes more than coral: anemones (with their resident clownfish), giant clams with wavy, colourful lips embedded in the coral, sponges, and the fish and invertebrates that live among it all. The coral is the stage; the whole reef is the show.

How to be a good reef visitor

Because coral is living, slow-growing, and fragile, treat it gently: never touch or stand on coral, keep your fins and hands clear, maintain good buoyancy, and wear reef-safe sunscreen. A careless kick can destroy decades of growth. Looking after the coral keeps the whole reef — and everything that depends on it — alive.

Once you can name what you're seeing — the reef-building hard corals, the swaying soft corals, the elegant sea fans — every dive and snorkel becomes richer. The Red Sea's reefs are among the world's most beautiful and diverse, and knowing their building blocks is the first step to truly appreciating, and protecting, them.

Want to explore the Red Sea's incredible reefs? Find the best snorkelling and diving spots on packnplan, and see hard corals, soft corals, and sea fans up close on your next trip.