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Koh 9 — The Deep‑Blue Drama of the Similan Islands

Where the water feels endless, the boulders feel ancient, and the fish move like storms.

Koh 9 (Koh Ba Ngu) is the wild, dramatic sibling of Koh 8.
If Koh 8 is soft and gentle, Koh 9 is bold and sculpted — all deep blue water, giant granite boulders, and swirling schools of fish that move like silver weather.

This is the island where snorkeling feels a little more adventurous, a little more cinematic, and a lot more “National Geographic.”

1) Christmas Point Shallows

Thai: แหลมคริสต์มาส
Romanization: Laem Christmas
Local pronunciation: Krit‑mat Point

Christmas Point is the signature snorkeling spot of Koh 9 — a maze of giant granite boulders underwater, with deep blue channels and bright coral blocks glowing between the rocks. It’s dramatic, beautiful, and full of movement.

What makes it beautiful

• Huge granite boulders forming underwater canyons
• Deep blue water with incredible visibility
• Bright coral blocks glowing between the rocks
• Schools of fish moving like silver storms

Fish you’ll see

• ปลาฟูซิเลียร์ (Pla Fusilier) — fusilier — “the silver confetti cloud”
• ปลาเจ้าเมือง (Pla Chao Mueang) — trevally — “the fast, shiny hunter”
• ปลากะรัง (Pla Garang) — grouper — “the chunky, quiet guardian”
• ปลาผีเสื้อปากยาว (Pla Phee Suea Pak Yao) — long‑nose butterflyfish — “the elegant one with perfect eyeliner”

“Christmas Point is the ‘I’m inside a granite cathedral’ snorkeling moment.”

2) Koh 9 East Reef

Thai: แนวปะการังด้านตะวันออกเกาะ 9
Romanization: Naew Pakarang Dan Tawan‑ok Koh Kao
Local pronunciation: East Side

The east side of Koh 9 is the calmest, softest part of the island — a gentle slope of coral gardens with warm, clear water. It’s the beginner‑friendly side of a dramatic island.

What makes it beautiful

• Calm, protected water
• Coral gardens stretching along the slope
• Soft morning light
• Easy snorkeling conditions

Fish you’ll see

• ปลาผีเสื้อเหลือง (Pla Phee Suea Lueang) — yellow butterflyfish — “the sunshine flutter”
• ปลากระพงลาย (Pla Krapong Lai) — wrasse — “the color‑changing chameleon”
• ปลาสินสมุทร (Pla Sin Samut) — angelfish — “the dramatic diva”

“The east side is Koh 9’s soft, slow, morning‑coffee snorkel.”

3) Koh 9 West Boulder Garden

Thai: สวนก้อนหินด้านตะวันตกเกาะ 9
Romanization: Suan Kon Hin Dan Tawan‑tok Koh Kao
Local pronunciation: West Side

The west side is deeper, darker, and more dramatic — a world of giant boulders, swirling fish, and blue water that feels endless. It’s not for beginners, but it’s unforgettable.

What makes it beautiful

• Massive granite formations
• Deep blue water
• Bigger fish and more movement
• A sense of scale that feels ancient and powerful

Fish you’ll see

• ปลาทูนาเล็ก (Pla Tuna Lek) — small tuna — “the fast silver bullet”
• ปลาฟูซิเลียร์ (Pla Fusilier) — fusilier — “the glittering cloud”
• ปลากะรัง (Pla Garang) — grouper — “the quiet guardian”

“The west side is where Koh 9 shows its wild heart.”

4) North Ridge Shallows

Thai: แนวตื้นปลายเหนือเกาะ 9
Romanization: Naew Tuen Plai Nuea Koh Kao
Local pronunciation: North Ridge

A quiet, gentle stretch at the northern tip of Koh 9. Coral blocks sit between sandy channels, and the water feels soft and peaceful.

What makes it beautiful

• Shallow coral blocks
• Soft blue light
• Calm water on good days
• A peaceful, slow atmosphere

Fish you’ll see

• ปลานกแก้ว (Pla Nok Kaew) — parrotfish — “the loud coral‑crunching gossip queen”
• ปลาจิ๋วฟ้า (Pla Jiw Fa) — blue damselfish — “the tiny electric boss”
• ปลาทรัมเป็ต (Pla Trumpet) — trumpetfish — “the long, shy pretender”

“North Ridge is the quiet breath between the dramatic sides of Koh 9.”

5) South Coral Line

Thai: แนวปะการังด้านใต้เกาะ 9
Romanization: Naew Pakarang Dan Tai Koh Kao
Local pronunciation: South Line

A soft, sandy stretch with coral patches and warm, easy water. It’s the gentlest part of Koh 9 — simple, beautiful, and perfect for slow floating.

What makes it beautiful

• Warm, shallow water
• Coral patches mixed with sand
• Easy entry
• Peaceful, slow‑moving atmosphere

Fish you’ll see

• ปลาสลิดทะเล (Pla Salid Talay) — rabbitfish — “the polite vegetarian”
• ปลาผีเสื้อเหลือง (Pla Phee Suea Lueang) — yellow butterflyfish — “the sunshine flutter”
• ปลาคราม (Pla Kram) — blue‑green chromis — “the sparkling confetti”

“South Line is Koh 9’s soft goodbye.”

🌺 The Feeling of Koh 9

Koh 9 is the dramatic chapter of the Similan story — the deep‑blue, big‑boulder, swirling‑fish chapter. It’s where the ocean feels older, wilder, and more powerful. It’s where you float and feel tiny in the best possible way.