Hi, I'm looking into incorporating data about seafloor sediment for an SDM, in particular where seafloor properties consistent with calcareous mud and silts (in other words, grain size, roughness, and chemical composition) are distributed across the Gulf of Mexico and Caribbean (as they represent the preferred habitat for my species' putative prey items). As far as I'm aware, no direct data exists that's viable for SDMs, but I am wondering if there are any suitable proxies?

I have read that backscattering data may be a possible proxy. The most extensive I have found is MODIS-Aqua's GIOP backscatter data, but they appear to focus on particulates at various wavelengths. Is it possible to infer seafloor properties from such data at a particular wavelength? In addition, are there any geochemical data that may work as well? Thanks.