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They will eat any non venom insect such as upside down beetles flys (do not feed it any type of ants) the especialy like moths and gold fish (they only eat goldfish when they are the right size) i have a great diving beetle as a pet and i feed it every day also great diving beetles will eat each other and for mating they are kinda like a pray mantis they beetle shows of in the water and if the female does not like it the female eats its head and great diving beetles will also eat turtle pelets and sea food such as (siclid food and just regular fish food)

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15y ago

What else can I help you with?