This is the 9619th most frequent Polish word.
wyspach
"Wyspach" means "islands" in the locative case in Polish.
In this sentence, 'wyspach' is the locative plural form of the word 'wyspa' (island), used to describe the location.
Wakacje na wyspach są bardzo relaksujące.
Holidays on the islands are very relaxing.
Here, 'wyspach' is also the locative plural form, specifying where the action of meeting people took place.
Spotkałem wielu ciekawych ludzi na wyspach.
I met many interesting people on the islands.
In this statement, 'wyspach' illustrates the unique location where these animals live, using the locative plural form of 'wyspa'.