Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
There are 30 fish in the tank. One third of them are blue, and half of the blue fish have spots. How many fish in the tank are blue, spotted fish?

### Response:
 Thuluthi moja ya samaki katika tangi ni buluu, hivyo samaki 30 / 3 = <<30/3=10>>10 ni buluu.
Nusu ya samaki buluu wana madoa, hivyo nusu ya 10 = <<10/2=5>>5 ni buluu wenye madoa.