Shockingly flat fish? (8,3)

I believe the answer is:

electric ray

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'shockingly flat fish?' is the definition.
'electric ray' can be an answer for 'fish?' (I've seen this before). I am unsure of the 'shockingly flat' bit.

'shockingly flat fish?' is the wordplay.
'shockingly' becomes 'electric' (I can't explain this - if you can you should believe this answer much more).
'flat fish?' becomes 'ray' (I've seen this before).
'electric'+'ray'='ELECTRIC RAY'

Can you help me to learn more?

(Other definitions for electric ray that I've seen before include "shocking thing" , "Shocking fish" .)

I've seen this clue in the Sydney Morning Herald.

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