Why do some fish lack a swim bladder? and which ones?
| December 9, 2020 | education
Cartilaginous fish (sharks, rays) do not have a swim bladder (a process of the intestine that regulates the depth of immersion of the fish), since it prevents the fish from swimming freely.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
