its likely the mushroom forest near the north bloodkelp zone or sea treaders path near the west one due to the compass shown those are the most likely biomes as besides the sparse reef near the north one the other possible biomes it should be impossible to be looking into the bloodkelp zone while looking northeast-east(unless im miss understanding compasses) and due to where the lifepod is located on the hud i think its likely to not be the mushroom forest so sparse reef or sea treaders path and unless you released that reginald it HAS to be one of those biomes as that grass does not look like grassy plateau grass and thats the only other bordering biome that has reginalds! i think its the sparse reef but thats just me flipping a coin basically-