The book of the corresponding member of the Academy of Sciences of the Ukrainian SSR, Doctor of Biological Sciences Professor Juvenal Petrovich Zaitsev, addressed to those who love rest by the sea, tells about the animals and plants that we meet while swimming on the free beaches of Odessa region. The practical tips given at the end of the book on how to make collections of marine organisms using publicly available materials will interest everyone who wants to take with them and preserve a particle of the sea. The book is designed for tourists, local historians, for everyone who wants to know their native nature better.