Enlist six peculiar character of cartilage fishes

Q- Enlist six peculiar characters of cartilage fishes.

Answer- There are several peculiar characters of the cartilage fishes but the six main peculiar features or characters of cartilage fishes are as follows:

1. The exoskeleton is formed of cartilage in these fishes.

2. Mouth is ventral and the ending gut is anus in these fishes. 

3. The heart of cartilage fish is 2 chambered and single circulatory. 

4. The gill slits of these fishes sare 5 to 7 in pair and are covered with operculum. 

5. The exoskeleton is formed of placoid scales.

6. These are exclusive marine.

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