neutral: blue [up triangles]{}; pushers: pink [down-triangles]{} and grey [diamonds]{}). (a) AP squirmers with $r_c=2.5\sigma$ and (b) $r_c=1.5\sigma$, (c) WP squirmers with $r_c=2.5\sigma$ and (d) $r_c=1.5\sigma$. Note the different scale on the y-axis.](ntxi10rc25hhbis.pdf "fig:"){width="0.48\columnwidth"}![\[fig:nct\_xi10\] Time evolutions of the mean cluster size for squirmers when $\xi=10$ (pullers: red [squares]{} and black [circles]{}; neutral: blue [up triangles]{}; pushers: pink [down-triangles]{} and grey [diamonds]{}). (a) AP squirmers with $r_c=2.5\sigma$ and (b) $r_c=1.5\sigma$, (c) WP squirmers with $r_c=2.5\sigma$ and (d) $r_c=1.5\sigma$. Note the different scale on the y-axis.](ntxi10rc15hhbis.pdf "fig:"){width="0.48\columnwidth"}

When self-propulsion dominates over attraction, squirmers in general form smaller clusters [(never larger than 4 particles on average)]{}. [ In either AP suspensions, the mean cluster size for weak pullers (black circles in panels-a and b) is larger than the one for any other $\beta$, fluctuating around a value of 3 for long times. In the case of neutral squirmers and large $\xi$ and after a long time ($t > 1000 \tau$), particles in the suspension become strongly aligned and most of the clusters are monomers, for both interaction ranges. ]{}

[When dealing with WP squirmers and high $\xi$, we have observed a small value of the mean cluster size (around 2), which indicates that 