So i followed the new fishing line, going through all the different fish from all the different biomes up to the great north. However the one fish i havent caught is the tetra with the cold bait you make from the tuna. Im assuming you catch it in the mountains biome as its the only biome that has a fish i havent caught and reading the patch notes said they added fishing to Frost cave where i assume to fish is to be caught at. However i've found two ice caves with the lake inside of them except theres no water, nor fish. Its just a solid flat plane of ground at the bottom of the lake. Am i maybe searching the wrong place or they spawn somewhere else in the frost caves? Has anyone caught a Tetra yet? Any help would be appreciated. Thank you.