Since you intend to consume this with out cooking, you will need to freeze it to kill the nematode parasites. Unless your freezer can get down to -20 below and stay that way for minimum of 24 hrs, it is not recommended.

Most commercial fish have been frozen at -35 below for minimum of 4 hrs and kept at -18 or below for a week.

The guidelines set by the FDA for fish intended for raw consumption.

'Freezing (-4°F (-20°C) or below (internal or external) for 7 days or -31°F(- 35°C) or below (internal) for 15 hours) of fish intended for raw consumption to kills parasites