Considering that there is Perforator Pilus in the current game, I am trying to find the real existence of cell spike structures.
In addition to the well-known cnidoblast possessed by Cnidaria, I found Desmodesmus.
Its sting appears to be for defense against engulfing. This is similar to increasing cell size.
May I ask if you have any further understanding of other cell spike structures? It seems that bacteria are more inclined towards chemical warfare than physical warfare.