It seems so. You can find more detail in the Wikipedia article on "Antifreeze protein".

There would be no change at all as these are proteins, you would digest them. You would need to inject these proteins to have any chance of an effect and since we are warm blooded creatures we would die of hypothermia before the antifreeze protein would take action.

Shing Leng Chan has written:

'Transcriptional regulation of the gene encoding the winter flounder antifreeze protein'

Antifreeze is molecular.

no, why would it have antifreeze?