Inheritance: describe question

In a species of tropical fish, fin colour is controlled by a single gene with two codominant alleles: C^R (red) and C^W (white). Fish that are homozygous for C^R have red fins, those homozygous for C^W have white fins, and heterozygotes have both red and white patches (mottled fins). A breeder performed a cross between two mottled fish and obtained the following offspring:

Describe the inheritance pattern of fin colour in this fish. Include in your answer the expected genotype and phenotype ratios from a cross between two mottled fish, and comment on whether the observed results are consistent with the expected ratio.