osteichthyes

6. : The ability of a fish to float or sink in water, regulated by the swim bladder.
10. : The class of fish characterized by bony skeletons.
11. : Fishing industries that catch fish for human consumption or other purposes.
12. : The fin located on the back of a fish, aiding in stability and steering.
13. : Overlapping plates covering the skin of bony fish, providing protection and reducing drag.
14. : Organs used by bony fish for extracting oxygen from water.
15. : The tail fin, the main source of propulsion for forward movement.
16. : Harvesting fish at a rate that cannot be sustained, leading to population declines.
17. : The fin on the underside of a fish near the tail, also assisting with stability.
18. : Damage to the natural environment where fish live, often caused by human activities.
19. : Paired fins located on the sides of the fish, assisting in steering and balance.

1. : Paired fins located on the underside of the fish, aiding in maneuvering and stopping.
2. : An air-filled sac in many bony fish that helps control buoyancy.
3. : A community of living organisms interacting with each other and their environment.
4. : Interaction between species where both benefit, such as clownfish and seaanemones.
5. : Breeding of fish for specific traits, leading to variations in color and pattern.
7. : Efforts to protect and preserve fish populations and their habitats.
8. : Fish that migrate from freshwater to the ocean to spawn.
9. : Reproduction process where eggs and sperm are released into the water for fertilization.
16. : A bony covering over the gills that helps with respiration in bony fish.