How to Keep an Octopus as a Pet: A Complete Beginner's Guide

Recently, more and more people are choosing to keep octopuses as exotic pets. Octopuses are highly intelligent and display unique behaviors, making them fascinating companions when cared for properly. However, unlike typical pets, they require special environments and attention. In this post, we’ll guide you through everything you need to know before bringing an octopus home.

▲ A healthy pet octopus showing off its arms in a home aquarium

1. Can You Really Keep an Octopus as a Pet?

Yes! Octopuses are actually quite popular among marine aquarium hobbyists. Species like the Common Octopus and California Two-Spot Octopus are commonly kept. However, the Blue-Ringed Octopus is extremely venomous and should never be kept as a pet. Be sure to research and choose a safe species before adopting one.

▲ Octopus exploring its surroundings in a clean, well-lit tank

2. What You Need to Prepare

• Spacious saltwater tank: At least 20 gallons (75 liters) or more
• Secure lid and filtration system: Octopuses are escape artists!
• Water heater: Maintain temperature between 72°F–78°F (22°C–25°C)
• Saltwater mix & salinity meter: To create a proper marine environment
• Oxygen pump and good filtration
• Decorations and hiding spots: Rocks, shells, PVC pipes, etc.
• Live food: Shrimp, crabs, clams

▲ Proper tank setup with live rocks and shelter is essential

3. Personality & Behavior

• Escape artists: They can squeeze through tiny gaps. Always secure the lid!
• Playful & curious: Enjoy manipulating objects
• Shy and reclusive: Need places to hide and feel safe
• Short lifespan: Most live only 1–2 years

▲ A shy octopus nestled inside rockwork, its favorite hideaway

4. Feeding and Daily Care

Octopuses are carnivorous and prefer live food. Suitable options include:

• Live shrimp, small fish, or crabs
• Shellfish like clams or mussels
• Frozen foods are possible but require training

Feed them once a day and remove any uneaten food to maintain water quality.

5. Cleaning and Tank Maintenance

• Weekly 20–30% water change
• Filter cleaning: Every 2 weeks
• Water quality tests: Check ammonia, nitrite, nitrate levels regularly

Be careful with sudden changes; octopuses are sensitive to water conditions.

6. Health Issues & Warning Signs

• Lack of appetite
• Constant color changes
• Lying still for long periods
• Swelling or visible wounds

If you notice these symptoms, check the water parameters and consult a marine specialist if needed.

7. Pros and Cons of Keeping a Pet Octopus

Pros:

• Highly intelligent and interactive behaviors
• Unique pet that stands out
• Visually appealing and fascinating to watch

Cons:

• Short lifespan
• High maintenance for tank and feeding
• Risk of escape and sensitivity to environment

Final Thoughts

Octopuses are among the most fascinating creatures to keep as pets. But they do require dedication and care. With the right knowledge and commitment, they can bring a lot of joy and discovery into your life. Are you ready to start your journey with a pet octopus? 😊