👉 In the context of biology, "nereidiform" refers to a type of fish that has two rays instead of one. This is known as a nereusiform fish or a hincapricidian fish. The name comes from the Greek word "nerei," which means "two," and "hidratus," which means "ray." These fish are often found in tropical and subtropical waters, such as those found in the Indian Ocean, where they can live