Wanted to show one of the way the Baleens would get their food.
This is considered a very lazy, relaxed method when you just want a quick snack, not a full on proper 'hunt' as it were.

The reason Baleens are green/brown is partially due to diet, partially due to evolution in their environment. Their mist desert is a mix of mangrove like plants on the coast, sandy shores, and swampy tidal estuaries.
The "shrimp" and other planktons and such they eat are primarily blue/green in color, unlike the pinker shrimp of Earth.

They also happily make use of water weeds and seaweeds in their diet. Mist plant nectar is a very rare seasonal treat for them as well, and sometimes is utilized as a preserving agent similar to sugar.

(They have plenty of salt due to where they live, and have no problem using it for preservation as well, but sometimes you want a nice sweet treat you know?)