like vs. unlike

[Aliraf62]

ESL/EFL Test #134 "Vocabulary Practice: Sharks (1)", question 9

English Grammar Tests, Elementary Level

ESL/EFL Test #134 "Vocabulary Practice: Sharks (1)", answer 9

Sharks don't have scales like other fish. Rather, they have smooth, rubber-like skin.

Correct answer: (b) scales
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Hi
Which one is correct when used to reflect the contrast between sharks and other fish:

1. Sharks don't have scales like other fish.
2. Sharks don't have scales unlike other fish.

'unlike' and 'like' in this sense seem not unlike each other or maybe unlike 'like', 'unlike' is most likely to appear at the beginning of the sentence.

Thanks
Ali

Ali

[Mister Micawber]

These are OK:

1. Sharks don't have scales like other fish.
2. Unlike other fish, sharks don't have scales.
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Native English teacher at Mister Micawber's