The purpose of this review is to analyze the characteristics of 12 selected marine natural resources such as Ecklonia cava, crab shells, kelp, marine mud, Sargassum, sea mustard, spirulina, squid, agar, chlorella, hijiki, and seawater and present its potential as a pet functional cosmetic material. Korea has traditionally used seaweed and seafood for food and health functional food industries, and functional materials extracted from marine natural resources have been actively studied and commercialized in the cosmetics industry due to antioxidant, anti-inflammatory, and moisturizing effects. According to the results of this study, substances derived from marine natural resources are antioxidant, anti-inflammatory, antibacterial, immune, moisturizing, wound healing, skin disease improvement, and skin regeneration. It is expected to improve pet skin health by showing various functional effects such as whitening, UV protection, and waste removal. Therefore, the use of pet cosmetics raw materials extracted from marine natural resources is expected to increase the competitiveness of the domestic cosmetics industry and meet the needs of consumers. In addition, it is expected that not only is it an alternative to practice carbon neutrality to increase the use of pet cosmetics made of seaweed, but also product development using by-products left as food will lead to and additional increase in farm income. As a result, it is proposed to expand to empirical research on pet functional cosmetics raw materials extracted from marine natural resources along with clear legal definitions and institutions for pet cosmetics and the development of marine resource mass production technology and supply systems.