The Hive is categorized into several classes.
A new variant of Hive known as "Nightmare Hive" can be found on a new Hive fortress in the Moon during Shadowkeep. In Destiny 2, the Hive can be found on Titan, Mars, the Tangled Shore, and the Dreaming City, as well as simulated versions of the Hive on Mercury in the Infinite Forest. They can also be found in places in Old Russia on Earth, such as at the Skywatch, where they occasionally fight with the Fallen who also reside there. The Hive is present on the Moon and constructed a massive underground fortress known as the Hellmouth.
The Hive intend to evoke a feeling of "undead royalty," and are a vaguely humanoid species with "dry, flaking skin encrusted with ancient armor." At least some of the Hive appear to have supernatural abilities, including the ability to hover or float and manipulate energy and electricity.
They follow a religion called the Sword Logic, which is an extreme form of Darwinism where only the strongest survive. In return for their service, the Worm Gods helped them escape the incoming Syzygy that was going to destroy their homeworld of Fundament. They have existed for billions of years in service to the Worm Gods who gave them their abilities directly from the Formless One. Their underground spaces are like a dungeon that has only recently been pulled up from too long underwater. The Hive will delve deep into a planetoid, unheeding of the damage they do in the process, crafting linked caverns and gothic-inspired columns. The Hive is an ancient species that traverse the stars in ships that act like sarcophagi, which have kept them alive by some magical means for millennia.