mangrove horseshoe crab. carcinoscorpius rotundicauda

amoebocyte ancient animal aquatic arthropods atlantic background beach breeding carcinoscorpius clear crab crawl crustacean delicious fishermen florida food fresh horseshoe island life limulidae limulus living lysate mangrove mangroves marine nature ocean polyphemus rotundicauda sand sandy sea seashore seaside shoe spines spiny thai thailand toxic tropical under water weird white wildlife