The FIO operates several smaller ships, as well as two research vessels. The flagship of the institute is R/V
Weatherbird II, a 115-foot, 194-ton vessel, that was acquired and renovated in 2009, and soon made national headlines as one of the most active research vessels during the 2010
Deepwater Horizon oil spill. In 2017, FIO launched R/V
W.T. Hogarth, a state of the art research vessel replacing the nearly 50-year-old R/V
Bellows which had served as a floating laboratory for 35 years. The R/V
W.T. Hogarth was named after Dr. William T. Hogarth, who served as the director of the FIO until his retirement in 2016. Since 1990, it manages the Keys Marine Laboratory on
Long Key. ==Members==