what do barnacles do to turtles

Barnacles are like stubborn hitchhikers on sea turtles: a few are usually harmless, but heavy growth can seriously slow a turtle down, weaken it, and even harm its health over time.

Quick Scoop: What Do Barnacles Do to Turtles?

1. The Basic Idea

• Barnacles are small crustaceans that glue themselves to hard surfaces, including turtle shells and skin.

• In small numbers, they mostly just “catch a ride” and filter food from the water, not bothering the turtle much.

• Problems start when there are lots of barnacles or when the wrong type grows in the wrong place.

2. How They Can Harm Turtles

• Increase drag: Extra bumps on the shell disturb the turtle’s smooth, hydrodynamic shape, so it has to use more energy to swim, migrate, or escape predators.

• Slow swimming speed: A heavy barnacle load can cut swimming efficiency significantly (some estimates suggest more than a 40% drop in speed in severe cases).

• Add weight: Large clusters weigh the turtle down, making it harder to reach the surface for air or move quickly.

• Block vision and senses: Barnacles around the eyes or head can obstruct sight, making it harder to spot food or avoid threats.

• Damage skin and shell: Some “embedding” barnacles burrow into skin or shell, causing wounds that can bleed and become infected.

• Signal poor health: A turtle covered in barnacles is often already sick, weak, or spending lots of time near the surface, which gives barnacles and algae time to pile up.

3. Are Barnacles Always Bad?

• Many barnacles are more commensal than truly parasitic: they benefit from the turtle’s movement without directly feeding on it.

• A few scattered barnacles on a strong, healthy turtle are generally not a big deal and are common to see in the wild.

• Trouble comes with:
  1. Very heavy coverage
  2. Barnacles on sensitive areas (eyes, flippers, joints)
  3. Burrowing species that damage tissue

4. Why So Many Photos of “Barnacle-Covered” Turtles Lately?

• Rescue centers and conservation groups often post images of turtles heavily encrusted with barnacles to raise awareness and donations.

• These turtles are usually already in bad shape from other causes (injury, boat strike, entanglement, pollution, or disease), and the barnacles are more a symptom of that weakness than the original cause.

• Online forums and social media in the last few years often discuss whether people should “help” by scraping barnacles off if they see such a turtle at sea or on the beach.

5. Should People Remove Barnacles from Turtles?

• Experts generally advise not trying to remove barnacles yourself unless you are trained and authorized.

• Scraping can rip skin or shell, cause bleeding, and open the door to serious infections.

• The recommended public action is usually:
  1. Do not disturb the turtle.
  2. Contact local wildlife or marine rescue authorities.
  3. Provide photos and location so professionals can step in.

6. Quick FAQ Style Recap

• Do barnacles eat turtles?
  No. They filter plankton from the water; they do not feed on turtle flesh.

• Why do barnacles choose turtles?
  Turtles are moving “platforms,” bringing barnacles through nutrient-rich water currents, which is great for these filter feeders.

• Is a turtle covered in barnacles doomed?
  Not always. Some rescued turtles recover after treatment, nutrition, and careful barnacle removal by professionals.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.