Fish rot easily, so bone specimens are usually made.

The plastic shelf is completed in one step, and the wooden board with the length greater than 1/3, the width of 15cm and the thickness of 1.5 ~ 2cm is taken as the bedplate. Put the fish skeleton in the center of the bedplate, and mark the positions of the rear edge, ventral fin and caudal fin of the fish head on the bedplate. Punch 0.2 cm holes in three places marked on the bedplate. A thin iron wire with a diameter of 0. 1 cm is wound around the front and back of the spine and the ventral fin, and then fixed on the bed board. Because there is no dry specimen, it is easy to deform, so the installed specimen should be tied to the dorsal fin and spine with 4 ~ 5 cotton threads and pulled up to make the specimen in a natural state. After the specimen is dried and the shape is fixed, the cotton thread can be removed.

(2) After setting, put it on a shelf, take a foam plastic board or cork board longer than fish, and a plurality of long needles (toothpicks are also acceptable). Clamp the fish head back and forth with two needles, hang the fish skeleton on one side of the foam plastic board, and fix the deformed part into a natural state with needles. After drying, take out the needle, take out the specimen and install it. Mark the rear edge of the fish head, the ventral fin and the middle of the coccygeal vertebra on the bed board, and punch holes with a diameter of 0.3 cm. Insert the same thick bamboo stick into the small hole, determine the height of the three pillars with the specimen, cut the upper end into a plane, add a drop of all-purpose glue (or gelatin), and then gently put the specimen on. Temporarily fix the sample, dry the glue, and remove the fixing frame.

If there are ribs falling off in the process of making specimens, we should pay attention to keeping them and deal with them together all the time. After the specimen is mounted and dried, it is glued in place with universal glue. Finally, label the specimen with a skewer.