M. minor is the least common of the beach hoppers along local sandy beaches, making their presence on the beach not as significant as the other beach hoppers for kelp removal. The size range of these amphipods is averaged around 8mm to 15mm. These amphipods can be difficult to identify, and usually involves comparing coxa five and coxa 4 (five is not as deep at four). A unique attribute to consider is that M. minor found in Santa Barbara commonly have a brown or maroon coloration, which distinguishes them from other amphipods. They also appear less robust or frail.