B2 Bistro + Bar will open a Jersey Shore spot just in time for summer. The bistro chain is replacing Martell’s Water Edge at 125 Bayview Ave., on Barnegat Bay in Bayville. B2 will open April 8 but on weekends only. The restaurant will fully open May 5 and operate seven days a week. “Now we get to offer what makes our restaurants so special, plus so much more, in a beautiful spot where the sunsets are spectacular,” managing partner Stephen Valentine said in a news release. “We’re so excited to open our doors during a time when people really need comfort, fun and a place to reconnect with friend…