Bony, Cartilaginous & Jawless Fish: Key Differences Explained

1. Bony fish (Osteichthyes)

* Have a bony skeleton

* Most abundant group of fish, with over 29,000 species

* Examples include tuna, salmon, and bass

2. Cartilaginous fish (Chondrichthyes)

* Have a cartilaginous skeleton

* Include sharks, rays, and skates

* Have a higher concentration of urea in their blood, which helps them maintain buoyancy

3. Jawless fish (Agnatha)

* Do not have jaws

* Include hagfish and lampreys

* Are the most primitive type of fish

Freshwater Fishing: Best Fishing Locations in New York State: Lakes, Rivers & More; Identifying Jack Salmon Fish Heads: Features & Characteristics; Pufferfish Inflation: Understanding Deimatic Defense; Catfish: Exoskeleton vs. Endoskeleton - Understanding Fish Anatomy; Top Pre-Spawn Bass Baits & Lures: Pro-Tested for Spring Success; White Salmon River & Northwest Lake: Location in the Cascade Range; Why Do Fish School? Benefits of Fish Schools and Shoals; Orlando Bass Fishing Report - July 2014: Expert Tips & Hot Spots; Freshwater Fish Capacity: Understanding Stocking Limits

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