there were 12 red fish,5 blue fish,and 2 yellow fish.how many fish were there altogether?

12 + 5 + 2 = 19

19 Fish all together.

To find the total number of fish, you can simply add up the number of red, blue, and yellow fish.

Given:
Number of red fish = 12
Number of blue fish = 5
Number of yellow fish = 2

To find the total number of fish:
Total number of fish = Number of red fish + Number of blue fish + Number of yellow fish

Substituting the given values:
Total number of fish = 12 red fish + 5 blue fish + 2 yellow fish

Adding the values together:
Total number of fish = 12 + 5 + 2

Calculating the sum:
Total number of fish = 19

Therefore, there are 19 fish in total.