Topics
CISCE: Class 12
Key Points: Aquatic Adaptations (Hydrocoles)
| Adaptation | Structural Feature | Function | Advantage |
|---|---|---|---|
| Streamlined body | Elongated, compressed head, body and tail | Reduces water resistance | Easy and fast swimming |
| Fins | Paired (pectoral, pelvic) and unpaired (dorsal, anal, caudal) fins | Act as paddles and stabilisers | Directional movement and balance |
| Gills | Thin, vascular respiratory organs | Exchange of gases in water | Efficient respiration |
| Lateral line system | Sensory receptors along body | Detects water vibrations | Awareness of surroundings |
| Swim bladder | Air-filled sac (in bony fishes) | Maintains buoyancy and depth | Energy-efficient floating |
Related concepts
- Adaptation in Animals - Adaptation in Reptiles
- Adaptation in Animals - Adaptation in Mountain Animal
- Adaptation in Animals - Adaptations in Tropical Rainforests
