** Shares of Indian shrimp exporters rise between 3.5% and 8%
** Coastal Corporation COAS.NS up 3.5%, Avanti Feeds AVNT.NS gains 5.8% and Apex Frozen Foods APEX.NS climbs 8%
** Shares extend gains after U.S., India release interim framework for trade deal that lowers tariff rate on Indian exports to 18%
** U.S. is one of the largest international markets for Indian seafood exporters
** Since a trade deal was first announced on February 2, AVNT has climbed 35%, APEX has risen 27% and COAS is up about 15%
(Reporting by Nandan Mandayam in Bengaluru)
((Nandan.Mandayam@thomsonreuters.com; Mobile: +91 9591011727;))