Top 15 Weirdest Animals in the World

Spook Fish

What’s that in its head?

Class: Fish
Order: Argentiniformes
Family: Spook Fish
Habitat: Oceans

We humans often wish we could know exactly what goes on in other people’s heads. But this isn’t just a figure of speech when it comes to spook fish: its head is see-through! But why? This fish lives deep down in the ocean, where there’s hardly any light. It can also rotate its eyes into its transparent head, letting it look in all directions to find the smallest bit of light. After all, it’s better than groping around in the dark.

Spook Fish - Illustration: Brauer, A. [Public domain], via Wikimedia Commons

• Table of Contents:
• 0. Introduction
• 1. Longhorn Cowfish
• 2. Glass Frog
• 3. Sawfish
• 4. Fried Egg Jellyfish
• 5. Streaked Tenrec
• 6. Red-Lipped Batfish
• 7. Saiga
• 8. Spook Fish
• 9. Clearwing Moth
• 10. Musk Deer
• 11. Dugong
• 12. Blue Ocean Slug
• 13. Giant Isopod
• 14. Leafy Seadragon
• 15. Leaf-Tailed Gecko