11) What is the first type of fish to have evolved?
12) How do sharks and rays stay in the water?
13) What is the most dangerous effect of Stonefish poison?
14) How do flying fish move?
15) What type of fishing method can collapse the food chain?
16) How do fish breathe?
17) What is the most common fish in the ocean?
18) How do fish swim?
19) What can fish become toxic from?
20) What happens to fish when they start to deteriorate?