Answer:
Este cangrejo es feo.
Step-by-step explanation:
In English this means: This crab is ugly. "Este" means that the crab is near the person who's speaking. It refers to certain proximity. If the crab was further away the correct demonstrative adjective would be "ese", which in English means "that": Este cangrejo es feo - That crab is ugly. "Este" has a plural, which is "estos" for male nouns and "estas" for female nouns. The translation of estos and estas in English is "these".