The class does not form a "solid piece" or a single fused mass at any point in its life cycle. Instead, these organisms are defined as cellular slime molds , meaning they maintain their individual cell membranes at all times.
The confusion likely stems from comparing them to a different group of slime molds. 🔬 Acrasiomycetes vs. Myxomycetes acrasiomycetes
: They exist as individual, independent amoebas. When food runs out, they swarm together to build a multicellular fruiting body called a sorocarp. Even when tightly packed together to move or build this structure, they remain separate cells with their own individual cell walls or membranes. The class does not form a "solid piece"