Glacier Swordfish

Glacier Swordfish is a Rare fish from Glacial Grotto. It takes Fish Head bait and is tied to Winter, with no time of day or weather listed. The wiki describes a sleek, powerful fish with a frosted, icicle-shaped bill and icy-blue tones.

A typical catch weighs 32.5 kg, from 20 kg to 106.4 kg, and sells at about C$7.667 per kg, for an average of C$249.2. That ranks 467 of the 742 documented fish, so it is in the lower-middle, while its maximum weight ranks 276 of 663, which is more respectable. A catch gives 210 base XP. In short, it is heavy for a Rare, but its price per kg keeps the sale modest.

Frostbite Flounder and Shiverfin Haddock are the other Rare fish documented in Glacial Grotto, so the three compete for the same spot on your line. It makes sense as a target if you are already there with Fish Head. Sell it for steady coins, and do not expect it to carry a whole session; it is a solid supporting catch.