** Shares of Bhagwan Marine BWN.AX rise as much as 4.4% to A$0.47, its biggest intraday pct gain since January 23
** Marine services provider says it will acquire all shares in Riverside Marine
** Deal values Riverside at an enterprise value of up to A$130 million ($91.27 million), on debt-free, cash-free basis
** Brisbane‑based Riverside is a marine services operator managing a fleet of about 30 vessels, serving clients in industrial resources, scientific research, and transport and logistics
** Stock down 3.2% YTD, including session's moves
($1 = 1.4243 Australian dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))