保护蓝鲸的英语标语如下：
1. "Protect Blue Whales, Preserve the Ocean's Majestic Giants"
2. "Whales are not just animals； they are the guardians of the sea. Let's save them!"
3. "Blue whales face extinction. Our actions today determine their future."
4. "Every whale counts. Let's take action to protect these gentle giants."
5. "Protect the blue whale, safeguard the balance of our oceans."
6. "The ocean is home to blue whales. Let's keep it safe for them."
7. "Blue whales are facing a dangerous future. We must act now to save them."
8. "Join the movement to protect blue whales and their habitats."
9. "The world needs to hear our call to save the blue whale."
10. "Protect blue whales, our planet's precious gift."
这些标语旨在提醒人们关注蓝鲸所面临的威胁，并鼓励采取积极行动来保护这些珍贵的海洋生物。