What Size Lobster Can You Keep in Florida? Understanding the Rules

Legal Lobster Size in Florida

If you’re planning to catch lobster in Florida, understanding size regulations is absolutely critical. These rules aren’t just suggestions — they’re strictly enforced and help preserve the long-term health of Florida’s spiny lobster population.

Whether you're diving during Mini-Season or heading out during the regular lobster season, knowing how to measure your catch correctly — and what size is legal to keep — will help you avoid costly fines, gear confiscation, and wasted dives.

Let’s break it down step by step.

The Official Legal Lobster Size in Florida

According to the Florida Fish and Wildlife Conservation Commission (FWC), the minimum legal size for keeping a spiny lobster is:

Carapace length of at least 3 inches, measured in the water before bagging.

The carapace is the hard shell on the lobster’s back, from the eye socket to the start of the tail — not the full body length.

How to Measure a Spiny Lobster Correctly

Tools Required:

• A lobster measuring gauge approved by FWC
  
  
• Your gauge must be with you in the water during any lobster dive
  
  

Step-by-Step Instructions:

1. Place the short edge of the gauge between the eye sockets
   
   
2. Check that the back of the carapace extends at least 3 inches beyond the gauge
   
   
3. If the carapace doesn’t clear the gauge, the lobster is undersized and must be released immediately
   
   

Important Notes:

• Measurements must be done while still underwater
  
  
• It is illegal to measure lobsters on the boat or after the dive
  
  
• Undersized lobsters found in your bag or cooler = automatic citation

What Happens If You Keep an Undersized Lobster?

The penalties for harvesting undersized lobster in Florida are severe:

• Fines starting at $500 per lobster
  
  
• Court costs and processing fees
  
  
• Confiscation of your gear, catch, or boat
  
  
• Possible arrest or license suspension for repeat violations
  
  

FWC officers patrol heavily during lobster season, especially in areas like the Florida Keys, Palm Beach County, and Martin County.

Egg-Bearing Lobsters: Also Illegal to Keep

Even if a lobster is the correct size, you cannot keep it if it’s carrying eggs.

How to Identify:

• Look under the tail for a mass of bright orange or red eggs
  
  
• They may look like small, round balls or fuzz
  
  
• These are egg-bearing females and must be released immediately
  
  

Tip:

If you accidentally bag an egg-bearing lobster, return it to the water as soon as you notice — and check your catch thoroughly before surfacing.

Do Different Rules Apply in Different Counties?

Yes. While the 3-inch carapace rule applies statewide, some counties (like Monroe County and Broward County) have stricter rules during Mini-Season.

Check for local updates before diving, especially if you’re:

• In Monroe County (Florida Keys)
  
  
• Within Florida State Parks or protected marine zones
  
  
• Near artificial reefs or restoration areas
  
  

Find current zone maps and updates on the [FWC website – https://myfwc.com/fishing/saltwater/recreational/lobster/].

Recommended Equipment for Measuring and Transport

To stay compliant and protect your catch, we recommend:

Measuring Tools:

• FWC-approved Lobster Gauge
  
  
• Coil lanyard or clip to attach it to your gear
  
  
• Spare gauge in your boat or bag (but always carry one underwater)
  
  

Catch Bags:

• One-way flap catch bag, like the [Lobster Inn Bag – https://www.keystonediveproducts.com], to prevent escapes without opening the full bag
  
  
• Durable, rinseable mesh or canvas
  
  
• Easy attachment to belt, BC, or float
  
  

The Lobster Inn Bag makes it easy to store your catch only after confirming it’s legal, without fumbling with zippers or worrying about re-opening.

FAQs About Lobster Size Rules

Can I measure lobsters on the boat?

No. You are required to measure lobsters underwater before placing them in your bag. Measuring them on the surface is a violation, even if you plan to release them later.

What if I can’t tell if it’s 3 inches?

If there’s any doubt, let it go. It’s not worth the risk — FWC officers will not give the benefit of the doubt on undersized lobster.

Is there a maximum lobster size?

No. Florida has only a minimum size limit. There’s no cap on the upper size as long as the lobster is not egg-bearing.



What happens if someone else on the boat keeps an undersized lobster?

Everyone on the vessel may be held responsible — especially if the responsible party cannot be identified. FWC often cites the entire group in such cases.

Summary: Legal Size = 3 Inches (Carapace), Measured in Water

If you remember nothing else from this article, let it be this:

Measure every lobster underwater.
If the carapace is under 3 inches, let it go.
If it’s carrying eggs, let it go.

Following these simple rules protects the ecosystem — and protects you from fines, penalties, or worse.

Call to Action: Dive Legal. Dive Smart. Dive with the Right Gear.

At Keystone Dive Products, we design our gear to help you dive smarter and safer. From patented catch bags to diver-friendly accessories, we’re committed to helping you stay compliant and catch more — without risking your haul or license.



Shop the Lobster Inn Bag and more at:
[https://www.keystonediveproducts.com]
Phone: (772) 341-2700
Email: info@keystonediveproducts.com
Serving divers across Florida from our base in Palm City.