Female fish contain spawn in egg skeins.
If the skein is firm, cut it into marble-size chunks and use immediately. Attach a pencil-type float or, for traditionalists, round bobber to your line about three feet or so above a swivel. Run a two foot leader between hook and swivel. Crimp a Snap-Loc to the top end of the swivel or a split shot just above the swivel, and you're ready for action. You can experiment with different lengths from float or bobber to the sinker to keep your bait near the bottom.