Odd One Out

Which one does not belong?

 
One of these does not belong with the others. Can you spot the odd one out?
🍎 🍎 🍌 🍎
Odd one out: 🍌 the banana — the rest are apples
🔵 🔵 🔵 🔴
Odd one out: 🔴 the red one — the rest are blue
🐕 🐈 🐟 🐕
Odd one out: 🐟 the fish — the rest have legs / are furry
The odd one out is the one that is different from the rest. Look at what the others have in common, then find the one that does not fit!