The slipper lobster (family: Scyllaridae) is a slow-moving crustacean, about 40-45 cm (15-18 in) long. Slipper lobsters living today have the same characteristics that they had millions of years ago. They have not undergone the slightest change in the intervening millions of years. The 98-million-year-old slipper lobster fossil shown here corroborates this fact.