So I was trying to tame it on a tapejara... When it is in turrent mode, it didn't hurt my tapejara. So maybe it's a glitch/bug but it won't hurt your tapejara. But I would shoot it off my tapejara obviously, then hop back on my tapejara and wait for the torrents to be over. But attacking a velonasaur while on a tapejara doesn't do damage unless the velonasaur hits it with its claws.