Plenty of fish in the sea - translation

Question

For the expression "There are plenty of fish in the sea" the translation for the exercise is  "Un de perdu, dix de retrouvés". Could you also use also use the expression "Le mer est plein des poissons".

Maarten Kamp · Accepted Answer

Erica, 
When translating idiomatic expressions it is often the case that direct translation is not the best answer. 
‘ un de perdu, dix de retrouvés ‘ is the colloquial, idiomatic French expression used in similar situations to the English expression ‘ there are plenty of (other) fish in the sea’. 
“ Il y a d’autres poissons dans la mer “ and many other ‘ direct ‘ translations such as your example, are not natural in French, although they are grammatically correct and may be understood.