Widow fish die quickly in fish bowl

Though some aquarium shops are stocking a large number of widow fish , these fish have a limited lifespan.
A local aquarium had sold the black and white widow fish for Rs 50 a pair.
Initially the fish were flourishing well, however the fish owner was not in goa for 4 days.
Though she had put some holiday food in the fish bowl, when she came back from the holiday, both the widow fish had died.
In comparison betta, fighter fish are far more hardy, surviving for more than 1 year in far worse conditions.

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