The bichir is one of the most ancient-looking fish kept by aquarists. Often called a “living dinosaur”, this species has existed for more than 100 million years, long before humans appeared. Its armored body, lung-like organs, and ability to crawl on land make it one of the most fascinating freshwater fish available today.

A Prehistoric Body Built for Survival

The bichir’s body looks like something preserved from the Jurassic era. Its armor-like protection comes from tough, bony ganoid scales, the same type found in ancient fossilized fish.

Key prehistoric features include:

• Long, eel-shaped body
• Multiple dorsal finlets
• Wide, powerful mouth

These traits helped early bichirs survive dramatic environmental changes over millions of years, making them incredibly resilient.

The Bichir’s Ability to Breathe Air

One of the bichir’s most remarkable traits is its ability to breathe atmospheric oxygen. It has paired lung-like organs that allow it to surface, gulp air, and survive where many fish would suffocate.

This adaptation helps bichirs:

• Live in low-oxygen waters
• Survive in muddy or stagnant areas
• Endure drought conditions

Walking on Land – Yes, It Can!

The bichir can move across land for short periods using its strong pectoral fins. It doesn’t exactly “walk,” but rather drags its body with surprising strength.

In the wild, this helps them:

• Move to deeper water during dry seasons
• Escape shrinking or dangerous habitats
• Seek better feeding grounds

Important for aquarists: bichirs are excellent escape artists—tanks must be tightly covered.

Calm but Powerful Predators

Despite their fearsome look, bichirs are typically calm and slow-moving. However, they are natural predators and rely on:

• A strong sense of smell
• Fast ambush strikes
• Night-time hunting instincts

Under dim lighting, their hunting behavior becomes mesmerizing to watch.

Popular Bichir Species in Aquariums

Care Requirements for a Healthy Bichir

1. Tank Size

A minimum of 200 liters is recommended. Larger species need even more space.

2. Tank Mates

Best kept with:

• Medium or large peaceful fish
• Non-aggressive species
• Tank mates too big to swallow

3. Water Conditions

• Temperature: 24–28°C
• pH: 6.5–7.5
• Soft to moderate hardness

4. Diet

Bichirs thrive on a high-protein diet consisting of:

• Worms
• Shrimp
• Pellets
• Small fish
• Insects

Why Bichirs Fascinate Aquarists

The bichir is more than a fish—it’s a piece of living history. Its dinosaur-like appearance, ancient adaptations, and graceful swimming make it a standout species for any aquarium.

They offer:

• Slow, elegant movements
• Night-time hunting behaviors
• A direct connection to prehistoric evolution

Few aquarium fish provide such a captivating, prehistoric charm.