Difference With Sturgeon (Caviar Fish) and Sharks

Sturgeon

• Osteichthyes
• Existed for over 300 million years
• Has a swim bladder
• Complete kidneys
• Same gill structure as sea bream and flounder

Sharks

• Chondrichthyes
• Existed for over 100 million years
• No swim bladder
• Undeveloped kidneys
• Gills are composed of 6 pairs of gill slits