1. Class:
- Cats: Mammals
- Sharks: Fish
2. Habitat:
- Cats: Terrestrial (land-dwelling)
- Sharks: Aquatic (live in water)
3. Body Covering:
- Cats: Fur or hair
- Sharks: Scales
4. Respiration:
- Cats: Breathe air through lungs
- Sharks: Breathe oxygen from water through gills
5. Body Temperature:
- Cats: Warm-blooded (able to maintain a constant internal body temperature)
- Sharks: Cold-blooded (body temperature varies with the environment)
6. Reproduction:
- Cats: Give birth to live young
- Sharks: Most sharks lay eggs, although a few species give birth to live young
7. Diet:
- Cats: Carnivorous (meat-eaters)
- Sharks: Carnivorous (some are filter-feeders)
8. Size Variation:
- Cats: Range from small to medium size, with some species like the Bengal tiger being larger than others.
- Sharks: Greatly vary in size, with the whale shark being the largest known fish species while some sharks, such as the cookie-cutter shark, are quite small.
9. Skeleton:
- Cats: Have an internal skeletal structure made of bones
- Sharks: Have a cartilaginous skeleton, meaning their skeletons are made of cartilage instead of bone.
10. Locomotion:
- Cats: Walk, run, and climb using their four limbs
- Sharks: Swim using their fins
11. Lifespan:
- Cats: Average lifespan of 12-18 years, depending on the species
- Sharks: Can vary widely, with some sharks living for over 50 years, such as the Greenland shark, while others may have a shorter lifespan.
12. Social Structure:
- Cats: Can be solitary or social, depending on the species
- Sharks: Vary from solitary to forming large groups called "schools" or "shoals"
These are some of the key differences between cats and sharks. While they share some similarities as vertebrates, they are distinct in terms of their biology, habitat, and adaptations.