Yep, there are lots of betta species! But actually, the majority of the bettas you see in this forum are all the same species which is Betta splendens
. Kind of how dogs are all the same species even though a chiguagua looks so different from a poodle. Jewels and Ezria are both Betta splendens
but Jewels is further classified as a Veil Tail (VT) and Ezria as a Crown Tail (CT). VTs have long flowy tails (females of course have a shorter tail), CTs have spikes at the end of their tails.
This website is awesome for learning about the different classes of bettas