What does "lates" mean?

Any of various large fish of genus Lates, especially the Nile perch (Lates niloticus) and the barramundi (Lates calcarifer).

What is a synonym for "lates"?

Common synonyms include: deceased persons, the dead, the departed.

/ˈleɪtiːz/ noun, slang

noun, slang ·Moderate ·College level

Noun

1
Any of various large fish of genus Lates, especially the Nile perch (Lates niloticus) and the barramundi (Lates calcarifer).
2
plural of late form-of, informal, plural

Etymology 1

Scientific Latin, from Ancient Greek λάτος (látos, “Nile perch”), of uncertain origin.

Etymology 2

Inflected forms.