What metaphors are used in The Bride Price by Buchi Emecheta?

Emecheta uses extended metaphors in this story. The first exemplifies the conflict that Akunna and her brother feel, caught, as they were, between traditional culture and European customs. She creates an image of fish caught in a net, referring to Aku-nna and Nna-nndo as,

helpless fishes . . . [who] could not as it were go back
into the sea, for they were trapped fast, and yet they
were still alive because the fisherman was busy debating
within himself whether it was worth killing
them.