Photo: Charles J. Sharp / CC BY-SA 4.0 (Wikimedia Commons)
Reptile Vulnerable (improving—downlisted from Endangered in 2025) Sightings: Possible year-round; most likely May through October Not dangerous — still wild
The green sea turtle glides through Biscayne's shallow waters on massive paddle-like flippers, grazing seagrass meadows like an underwater gardener. These ocean nomads migrate thousands of miles between feeding grounds and distant nesting beaches—a remarkable journey that can span their entire 90-year lifespan. A genuine privilege to witness from a respectful distance.
📏 Keep your distance: 25 yards minimum
Stay safe
Maintain 25-yard distance at all times. Move slowly and quietly to avoid startling them. Never touch, chase, or attempt to feed. Report any boat strikes or injured individuals to park rangers immediately.
If you encounter one
Observe from your boat or kayak at 25 yards distance. Move slowly and avoid sudden movements. If the turtle appears stressed or approaches, slowly back away. Never attempt physical contact or photography that stresses the animal.
Never feed or approach wildlife — it's dangerous for you and often fatal for them.
🦊 Species ID card
- Size & weight
- Large sea turtle with teardrop-shaped carapace and large paddle-like flippers
- Identifying features
- Dorsoventrally flattened body with large teardrop-shaped carapace, olive to black in color. Distinctive large paddle-like flippers. Usually lightly colored, though some eastern Pacific populations appear nearly black. Unlike other sea turtles, green turtles are uniquely herbivorous as adults.
- Habitat
- Shallow lagoons, seagrass meadows, and coral reef areas. Green turtles are the only sea turtle species that remain herbivorous throughout their lives, feeding on seagrass instead of transitioning to meat-based diets.
- Diet
- Seagrasses and marine vegetation (strictly herbivorous)
- Active
- Diurnal (active during daylight hours while feeding)
- Lifespan (wild)
- Up to 90 years
👀 Where & when to see them in Biscayne National Park
Where to look
Shallow waters and seagrass beds throughout Biscayne National Park, accessible via boat or kayak from Convoy Point, Elliott Key, and Boca Chita.
Best time
Early morning and late afternoon when water clarity is optimal and turtles actively feed on seagrass beds.
Spotting tips
- Search shallow water edges and seagrass bed peripheries for feeding turtles\n
- Watch for the distinctive steady paddling motion of their flippers\n
- Early morning offers best light and clearest water visibility\n
- Use binoculars from your boat to scan wider areas without disturbing them\n
- Patient, slow observation beats active searching—stay quiet and let them come to you
Accessibility
Best viewed via boat or kayak in shallow waters. Limited shore-based viewing possible at Convoy Point visitor area and Elliott Key. Active turtle observation requires water-based access to seagrass beds where they feed.
With kids
Excellent educational opportunity about marine conservation and species recovery. Teach children that "looking, not touching" is how we respect wildlife. Keep kids at safe 25-yard distance. Use sightings to discuss migration, herbivory, and why this species was endangered.
📷 Photographing them
Best vantage points
Shallow water areas near Elliott Key, snorkeling zones around Convoy Point, seagrass meadows in the park's central waters where turtles feed.
Bring
Snorkel gear for water-based viewing, binoculars for distant observation from your boat, camera with telephoto lens for safe photography from distance.
Shoot ethically
Do not chase or corner turtles for photographs. Maintain 25-yard minimum distance. Avoid flash photography. Do not disturb nesting areas, beaches, or hatchlings. Never use your presence as a photo opportunity if it alters the turtle's behavior.
🔭 Gear that helps you spot them
🌲 Natural history
- Migration
- Long-distance migrants between tropical feeding grounds and distant nesting beaches. Some individuals may be year-round residents of Biscayne waters while others pass through during migratory cycles.
- Winter
- No hibernation; active year-round in warm tropical and subtropical waters
🌍 Conservation
Threats
Fishing net entanglement and bycatch, marine pollution and ingested plastics, coastal habitat loss from development, climate change affecting nesting beach sand temperatures, boat strikes, and degradation of seagrass feeding beds.
Protection efforts
Biscayne National Park's marine protected area status restricts commercial fishing and limits maritime activities. Nesting beaches receive active monitoring and protection. Speed zones and boating regulations reduce collision risk. Federal law prohibits collection, harm, or killing of green sea turtles.
How visitors help
Report all sightings to rangers for population monitoring. Maintain the 25-yard safe viewing distance religiously. Never touch, chase, or feed. Dispose of trash properly—sea turtles mistake plastic bags for jellyfish, their natural prey. Support marine conservation organizations working to protect nesting beaches and ocean health.
Report sightings
Contact Biscayne National Park rangers via https://www.nps.gov/bisc/index.htm or report sightings to your boat tour operator or at the visitor center at Convoy Point.
❓ Questions people ask
Will a green sea turtle bite or attack me?
No. Green sea turtles are herbivorous and not aggressive. They are shy by nature and will swim away if approached. Maintaining a 25-yard distance keeps both you and the turtle comfortable and safe.
Why are they called 'green' if their shell looks dark?
The name refers to the greenish color of their fat beneath the shell—a result of their seagrass diet. The carapace itself is typically olive to black, not green.
How long do green sea turtles live?
In the wild, they may live up to 90 years, making them remarkably long-lived ocean travelers that complete multiple migration cycles in their lifetime.
Is it illegal to touch or feed a green sea turtle?
Yes. Federal law strictly protects green sea turtles. Touching, feeding, or disturbing them is illegal and carries significant fines. They are wild animals, not pets.
When do baby turtles hatch in Biscayne?
Nesting occurs on Atlantic beaches during warmer months. Hatchlings typically emerge at night and instinctively crawl toward the ocean. Do not disturb nesting areas or help hatchlings—they must complete the journey independently.
Can I see green sea turtles while snorkeling?
Yes, designated snorkeling zones in Biscayne offer genuine opportunities to see turtles in their natural seagrass habitat. Maintain distance and move slowly to avoid disturbing their feeding.
