NEW YORK — Subway service was partially suspended in Coney Island on Wednesday when an F train derailed near the West Eighth Street-N.Y. Aquarium station in Brooklyn. The train jumped the tracks just before 12:30 as it approached the Neptune Avenue Station, NYC Transit President Rich Davey told reporters at the scene. “We have crews crawling all over this superstructure to see what happened,” Davey said, gesturing to the elevated track of the Culver Line, which carries the F train through southern Brooklyn. “Our focus will be on the track — it looks like there may have been a track issue,” he …