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Stingray
Despite having a toxic stinger, these fish are shy and prefer to avoid humans.
Stingrays can be placed in a Fish Pond, where they will reproduce every 4 days. The initial pond capacity is 3 fish, but the capacity can be increased to 10 by completing two quests. The primary output is dark brown Stingray Roe, but more valuable items are possible starting at population 4.