Examples described herein include optical adapters. In some examples, an optical connector adapter includes a housing with a first end and a second end, a latch assembly inside the housing, and an adapter optical ferrule. The latch assembly may include two latch arms and an engagement feature to mate the adapter to a number of optical transceiver shells. The engagement feature may protrude beyond the second end of the housing. The adapter optical ferrule is attached to the two latch arms.