Here are the key characteristics ofdinosaur fish(Polypteridae) in English:

1. Ancient Lineage

• One of the oldest surviving fish groups, dating back to theCretaceous period(over 100 million years ago).

2. Unique Body Structure

• Armor-like scales: Covered in thick,ganoid scales(similar to ancient fish).
• Elongated body: Eel-like or snake-like shape, with adorsal fin divided into spiny rays.

3. Primitive Lungs

• Can breatheboth water and air(bimodal respiration), allowing survival in low-oxygen waters.

4. Pectoral Fins

• Muscular, lobed fins(similar to early tetrapods) that help them crawl on land or move in shallow water.

5. Carnivorous Diet

• Predators that eatsmall fish, insects, and crustaceansin the wild.

6. Habitat

• Found infreshwater rivers, swamps, and floodplainsofAfrica(Nile River, Congo Basin).

7. Popular in Aquariums

• Known as"living fossils", they are kept by advanced fish keepers due to their hardiness and unique appearance.

Would you like details on specific species (e.g.,Polypterus senegalusorErpetoichthys calabaricus)