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Review on Seaweed as Supplement Fish Feed

Algae are aquatic photosynthetic organisms and the base of food chain. They are the food producing resources that fish are adapted to consume. They can divide into two major groups “microalgae and microalgae (seaweed)” according to their size. Seaweeds are classified into three taxonomic groups: Rhodophyta (red), Chlorophyta (green) and Phaeophyta (brown). They act as a major feed ingredient in nutrional studies and are not considered as an essential fish feed source, but rather as enhancing “standard” feed formulations. Marine macroalgae have been used for healthy feed supplement providing necessary amino acids, beneficial polysaccharides, fatty acids, antioxidants, vitamins and minerals [1,2]. They prefer as food by herbivorous fishes since their stomach have low pH levels and specialize guts required for the digestion of plant materials [3]. Moreover, they improve the immune system, antiviral, antimicrobial, improved gut function and stress resistance serves as an alternative for fish meal, since their proteins do not contain such high P levels, and they would help to take the pressure off wild fish stocks [4]. There is limited evidence that herbivorous and omnivorous fish “.g. trout, salmon, sea basss and seabream” were more effective at digesting and utilizing seaweed in diet.