Yes! That would Eleodes goryi. I caught a bunch and they are breeding. I tried to put a few larva in containers with out substrate but they all died. Right now I have the larva in 100% coco nut coir and keep it as deep as I can. I'm going to try to isolate again when the meal worms are bigger.
I found my darkling beetles like cucumber, carrot, apple, potato and red leaf lettuce the best for fruit and veggies. I give them oat meal and ground flax seed for grains and for processed food/protein I give them dog food, hermit crab food, tad pole food, and fish flakes. I have tried banana, strawberry, radish leaf, tomato, cilantro and parsley but they did not seem to be interested in those at all. I like to mix things up to give them variety. Since my family eats a lot of organic fruit and veggies and we have guinea pigs there are lots of scraps of things to give the beetles. I'm kind of excited to try pumpkin since it is October.
My kids and I love these beetles. They are always active and willing to eat. They are so fun to watch in the evening as they run around and around and around the tank. We have one beetle we call Speedy (Cerenopus concolor), he always does clockwise laps. Never counter clockwise. I never really thought the beetles would have personalities but as the kids and I watch them in our community tank we can really see how different they all. It's pretty cool. I'm so glad we started this beetle journey. It's awesome.