Bottom Depth Range: 210-315 feet (64-96 meters)
MacNeil Bank is located northeast of East Flower Garden Bank, and is structurally connected by a ridge running between the two features. The prominent areas of MacNeil, East Flower Garden, Rankin and 28 Fathom Banks are located around the semicircular rim of a depression in the sea floor that is about 14 km (2.5 mi) across.
MacNeil Bank is about 6 km long (3.7 mi), 450 m (1476 ft) wide, and bisected by a 230 m (754 ft) wide trough. The southern portion of the bank stands about 16 m (52 ft) above the sea floor to the east. In contrast, the northern portion of the bank stands less than 10 m (33 ft) above the surrounding sea floor. The shallowest portion of the bank is 64 m (210 ft) beneath the surface.
ROV surveys show mesophotic habitat at MacNeil Bank, including black corals, gorgonians, sponges and fish. It is also designated as a Habitat Area of Particular Concern (HAPC).
MacNeil Bank is named after F. Stearns MacNeil, a U.S. Geological Survey geologist.