Exploring phytobiotics in aquaculture: sources, mode of action, effects, administration, and its bioavailability in fish.

Fish is an important source of animal food for humans because it contains essential nutrients that are easily absorbed by the body. However, the intensification of aquaculture can be harmful to the fish, making them more susceptible to reduced diseases and slow growth. The excessive use of antibiotics is a major concern as it can lead to the accumulation of antibiotic residue in the fish. As a result, many countries have banned the use of antibiotics in fish feed. Phytobiotics, derived from various plant sources, have gained importance as additives in fish feeds and are seen as a promising alternative to antibiotics due to the presence of various bioactive compounds that have the potential to enhance fish production and health. The bioactive compounds present in plant sources such as essential oils, microalgae, seaweed, medicinal plants, and seeds, like Aloe vera and licorice, offer a wide range of beneficial effects in promoting growth, antimicrobial activity, antioxidant properties, and immunostimulant. The main topics of this review highlighted the various sources of phytobiotics, their mode of action, their effects on growth performance, and their therapeutic effects in fish. While phytobiotics have low bioavailability, exposure to them has shown positive effects on organs and several tissues in fish. This present article is also designed to provide an insightful information about the administration of phytobiotics and its bioavailability in fish. Furthermore, this review offers an intuitive knowledge regarding various methods for extracting the phytobiotics. [ABSTRACT FROM AUTHOR]