Back to Research Organisms Little Skate Home Groundbreaking Research at the Ůֱ Research Organisms Little Skate Credit: J. Andrew Gillis Little skates (Leucoraja erinacea) are bottom-dwelling cartilaginous fishes found across the northwestern Atlantic Ocean. They prefer sandy and gravelly environments of no deeper than 300 feet and are typically active at night, spending days buried in sediment. Skates are close cousins of sharks and rays and are an important model organism for biological and medical research. They are cartilaginous, so unlike humans their body structure is made of cartilage instead of bone. They continue to grow that cartilage throughout their adulthood. By studying the methods behind that growth, scientists aim to learn how to stimulate cartilage growth in humans. Did you know that skate egg cases are commonly called “Mermaid’s Purses?” Scientific Name: Leucoraja erinacea Type: Cartilaginous FishHabitat: Sandy or gravelly habitats up to 3000 feet deepRange: Western Atlantic OceanLife Span in the Wild: 10-15 yearsSize: 16-20 inchesWeight: 1-2 poundsDiet: Benthic invertebrates including crustaceans, amphipods, and annelids, and some small benthic fishStatus: Species of Least Concern Remote video URL Credit: Marine Biological Laboratory / BioQuest Studios / Nguyen Khoi Nguyen Skates and the Ůֱ MBLscientists use skates and their embryos to study skeletal development. By shining a light through egg cases, scientists can watch the entire maturation process. Unlike other fishes, skates, sharks and rays have small cartilaginous appendages that support their gills. MBLresearchers think that the fins of fishes and the limbs in humans may have originally evolved from gill appendages like the ones found in the skate. By comparing the development of skates and other cartilaginous fish to that of bony fish, scientists hope to learn about common ancestors of all jawed vertebrates. Learn more about the Gillis Lab Skate News An Ark-Full of Scientific Wonders in a Lab Inspired by Woods Hole March 15, 2024 MBLResearch Year in Review December 29, 2023 Looking Sharp: Shark Skin is Unique and May Have Medical Use, Too November 1, 2023 How 3D Changes in the Genome Turned Sharks Into Skates | Quanta Magazine May 30, 2023