Miso Soup With Yellowtail Snapper

3 servings.
9 oz. fish filet,
1/2 c. peeled celery,
1/2 c. miso paste( light or dark),
1/3 c. red onion,
1/4 c. scallions,
1 tsp. - 1 T. minced ginger,
1/3 c. cucumber,
1 qt. water 1/3 c. carrots.