However, less than 10 percent of India's natural potential is used for aquaculture currently. For bringing more areas under scientific fisheries and aquaculture, the Indian government and premier fisheries research institutes are trying hard to sensitize the fish farmers and entrepreneurs regarding the package of practices and prospects of the highly promising ‘culture-based fisheries technology (CBF)’ in inland waters. Utilization of untapped inland waters through CBF is one of the foremost strategies for achieving blue revolution. CBF is generally practiced in inland waters having areas between 100 and 1000 ha (lakes, wetlands and small reservoirs) and cautiously in 1000–5000 ha (medium-sized reservoirs) Brackishwater aquaculture The FAO of the United Nations estimates that about 1.2 million hectares of potential brackishwater area available in India is suitable for farming, in addition to this, around 8.5 million hectares of salt affected areas are also available, of which about 2.6 million hectares could be exclusively utilised for aquaculture due to the unsuitability of these resources for other agriculture based activities. However, just like India's fresh water resources, the total brackishwater area under cultivation is only just over 13 percent of the potential water area available. Carp hatcheries in both the public and private sectors have contributed towards the increase in seed production from 6321 million fry in 1985–1986 to over 18500 million fry in 2007. There are 35 freshwater prawn hatcheries in the coastal states producing over 200 million seed per annum. Furthermore, the 237 shrimp hatcheries with a production capacity of approximately 11.425 billion post larvae per year are meeting the seed requirement of the brackish water shrimp farming sector. Ornamental Fish India's domestic ornamental fish Industry is 300 crore rupees worth. In 2017, India exported ornamental fish worth Rs 9.5 crore, a 40% increase from the previous year. Sea Weed Karnataka is the largest producer of seaweed in India producing 22 thousand tonnes followed by Gujarat, Maharashtra and Lakshadweep. The red seaweed is the most cultivated variety of seaweed in India. In 2018 the Indian government set up 10,000 seaweeds culture units in Andhra Pradesh under the Central government's Blue Revolution scheme. Distribution There are ten main fishing harbors at: Mangalore in Karnataka, Chellanam, Vypeen, Koyilandy, Neendakara, Vizhinjam in Kerala, Tuticorin, Nagapattinam, Chennai in Tamil Nadu, Vishakhapatnam in Andhra Pradesh, and Raichak in West Bengal 23 minor fishing harbours and 95 fish-landing centres are designated to provide landing and berthing facilities to