Baby flatworms are different from baby nudibranchs because baby flatworms
are from the phylum Platyhelminthes, while baby nudibranchs are from the phylum Mollusca. This means that baby flatworms belong to a different animal group than baby nudibranchs.
In terms of physical characteristics, baby flatworms typically have a flattened, elongated body shape with a soft and slimy texture. They often have a simple, tube-like digestive system and lack specialized body structures such as a true respiratory or circulatory system.
On the other hand, baby nudibranchs have a more distinct body structure. They have a soft body covered in various appendages called cerata, which can be used for respiration, digestion, and defense. Nudibranchs also have a well-developed digestive system and a complex series of branching gills or other respiratory structures.
Overall, the main difference lies in their taxonomic classification and distinct body structures, which make baby flatworms and baby nudibranchs easily distinguishable from each other.