Shellfish in nature:
eat animals and fish;
participate in the formation of sedimentary rocks (shells);
help to cleanse reservoirs by filtering water;
harm agriculture – damage crops, vegetables, vineyards.
Shellfish in human life:
eaten (squid, oysters, mussels, octopuses);
pearls ripen in shells, they are used for jewelry, like some shells;
ink (octopus, cuttlefish) is used in the paint and varnish, printing industry, and medicine.
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.