Quiet refuge for animals and fish (5)
I believe the answer is:
shark
'fish' is the definition.
(sharking is a kind of fishing)
'quiet refuge for animals' is the wordplay.
'quiet' becomes 'sh'.
'refuge for animals' becomes 'ark' (as in Noah's ark).
'sh'+'ark'='SHARK'
'and' is the link.
(Other definitions for shark that I've seen before include "eg Jaws" , "predator" , "Predatory creature" , "marine fish" , "Unscrupulous greedy person" .)