Table 1. Hydrographic conditions of water column samples collected proximate to two steel shipwrecks Halo and U-166 in the northern part of Gulf of Mexico.

The depth, temperature, salinity and dissolved oxygen (DO) for the water samples collected from Halo and U-166 are listed below.

	Halo	U-166
Depth (m)	141.3	1448.9
Temp (°C)	17.7	4.3
Salinity (PSU)	36.3	35.0
DO (mg/L)	4.1	6.6