John 21:10

Even though there was already one fish (Gr. opsarion, singular) on the fire Jesus instructed the disciples to bring some of the fish (plural) that they had caught. He would not provide for their physical needs by multiplying the food miraculously as He had done in the past. Now He would use the product of their labor to satisfy their need. Nevertheless it was clear that their fish had been the result of His miraculous provision. Perhaps this was all symbolic of how Jesus would carry out His mission through His disciples in the future compared with how He had done it during His pre-cross ministry.