Quite lucky, Ah beng still have the purple seafan and CF had new shipment of seafan... So managed to stock within a week... Only picked the more special ones..
Need to wait for shipment to stock again.. Meanwhile will just enjoy it..
The clam should be fine if it is not finding the goby an nuisance... If it is feeling stress try to catch the goby out then but I doubt it is easy to do so...