is this normal for mi pearl gourami

well i went to petco and i bought a pearl gourami black lyretail and a red wag s/t and i think the swordtail is harrasing it a little to much! should i see if it progresses more and i was wondering what should i do with mi preganant molly should i keep it in there shes doing fine its a 75 gallon tank and its doing better than ever i know have two baby mollies there doing good but im just worried about the pearl plz help before its to late

 

u can try to seperate the pear groumi or the swordtail that is harrassing them

 

i doubt it cause a kid brought it in plzzz i need help asap