Fowlea schnurrenbergeri

The bar-necked keelback, or Kramer's keelback, is a non-venomous colubrid. The body is stout, with keeled scales on top and smoother side rows. It is olive brown above with six rows of boxes or bars that gradually fade towards the rear, and the belly is usually yellowish-white or white with a black edge on the side of each belly scale (Wikipedia, general species account).

It is much more aquatic than the checkered keelback, found in or near water hyacinth and hiding in aquatic vegetation.