It's an odd-looking, saltwater fish that is used by McDonalds in theie Fillet-o-Fish Sandwich. It's been in the news because they are being over-fished
Gor gor = big brothermui mui = little sister ( affectionately )
jumbow
The Jyutping for 'Grandpa' in Cantonese is 'je je', but if you can't read jyutping, it's pronounced as 'ye ye.'
歡迎the written form is actually the same as the one in Mandarin yet different pronunciation