Some diatoms are benthic and live on mud, seaweeds , and other surfaces . what type of adaptions to this particular habitat you expect them to have ?

Marine Habitats However, there can be a variation such as those that live near the surface and ... It's where if you are swimming in the ocean, you feel the water get cold all of a Ex. Fish, marine mammals, squid, some other invertebrates, whales, shark, Types: golden-brown algae (freshwater), 2 others, and diatoms.

Had to find that :/

Some of the diatoms are able to stay afloat and some of them lies at the bottom of the water bodies.

The can easily float because they have a large surface area and they can extend their body parts and makes them sink much slower.

Other types of the diatoms remains attached to the benthos and because they do not have appendages and they sink in the bottom of water.

Some of the diatoms that live on mud have the appendages for crawling.