disabling collisions between specific robot nodes in webots r2023b

[zaracoles1]

Hello, I am very new to Webots and am using it to create a simulation of an ant colony (however I am finding maybe unity or something may have been better haha but its too late now!) I am currently modelling each ant as a robot but because I am going to make hundreds of ants in the simulation, it is too time consuming and computationally expensive to make them constantly avoid other ants, and i want to make it so that they move straight through eachother. Does there exist a physics plugin (or how would I make one) so that I can ignore the collisions between ants only whilst still letting them have gravity and not fall through the floor or walls. Thank you :)