A catty of 100 squid seedlings will grow 200 grams in two years. According to relevant public information inquiries, the mud carp can only grow to about 100 grams a year. The mud carp is a small freshwater fish, with common individuals weighing less than 500 grams, and the largest individual reaching 4 kilograms. Under natural conditions, the first-year-old fish can only grow to about 100 grams, and the second-year-old fish can only grow to 200 grams.