A sacculina is a genus of barnacles, which is a castrator of crabs.
Locomotion = movement.Crustaceans generally move using their legs, but some, like barnacle adults and species like Sacculina, are anchored in place.
Insects (six legs), being silverfish, mayflies, dragon/damselflies, stone flies, fleas, lice, crickets, grasshoppers, true bugs (stink bugs etc), aphids, cicadas, butterflies, moths, bees, wasps, ants, flies, hoverflies, mosquitos, beetles... (pretty much all arthropods with wings really, save the silverfish) Arachnids (eight legs), being spiders, harvestmen (not spiders!), scorpions, horseshoe crabs (really, they're not crustaceans), sun/camel spiders, ticks and mites. Crustaceans (ten legs), being crabs, lobsters, shrimps, water fleas, barnacles, sacculina and relatives (look them up, they're fascinating parasites), krill and lots of other plankton. Myriapods (many legs), being centipedes and millipedes. Hope I helped! I love arthropods, I've studied them for a few years.
Insects (six legs), being silverfish, mayflies, dragon/damselflies, stone flies, fleas, lice, crickets, grasshoppers, true bugs (stink bugs etc), aphids, cicadas, butterflies, moths, bees, wasps, ants, flies, hoverflies, mosquitos, beetles... (pretty much all arthropods with wings really, save the silverfish) Arachnids (eight legs), being spiders, harvestmen (not spiders!), scorpions, horseshoe crabs (really, they're not crustaceans), sun/camel spiders, ticks and mites. Crustaceans (ten legs), being crabs, lobsters, shrimps, water fleas, barnacles, sacculina and relatives (look them up, they're fascinating parasites), krill and lots of other plankton. Myriapods (many legs), being centipedes and millipedes.