Rams won't snag food from the surface or water column at all? I had no idea!
The common or blue ram,
Mikrogeophagus ramirezi, including all the artificial forms (gold, German, etc), will surface feed usually, or sometimes. The Bolivian (
M. altispinosus) will not, at least in my experience with this fish over 20+ years and from my research. A fish literally starving might I suppose. Sinking foods in the water column are sometimes snatched, then spit out onto the substrate and eventually eaten, depending upon the size.
This is hinted at in the genus name,
Mikrogeophagus, which is derived from the Greek
mikr [= small],
geo [= earth] and
phag [= eat), so literally, "small eartheater."
On the nomenclature, if anyone is interested as I am in such things, these two species have gone through several name changes (the genus). Finally in 2003, the Swedish ichthyologist and cichlid authority Sven Kullander placed these two species in M
ikrogeophagus, a genus that had originally been erected by Meulengracht-Madsen in 1968 but which was devoid of species. These are the only two species in the genus, to date anyway.
Byron.