O filme tem dois cartazes
The two beautifully minimalist posters of Yorgos Lanthimos’ dystopian movie The Lobster have been created by Greek designer Vasilis Marmatakis (cofounder, but no longer part, of MNP). The pair of posters feature once Colin Farrell, once Rachel Weisz, embracing a person-shaped void. - src
E na IMDb sinopse da trama:
In a dystopian near future, single people, according to the laws of The City, are taken to The Hotel, where they are obliged to find a romantic partner in forty-five days or are transformed into beasts and sent off into The Woods.
Assim, o cartaz se encaixa muito bem na história, pois o vazio representa muito bem o parceiro desaparecido.
Nota: Eu não vi o filme, mas o pôster complementou muito bem a sinopse da IMDb.