tetrapods
Limbed vertebrates generally
Tetrapods are vertebrate animals with four limbs or descended from four-limbed ancestors.
The group includes amphibians, reptiles, birds, and mammals—even snakes and whales, which lost their legs evolutionarily.
In coastal engineering, tetrapods are four-legged concrete structures placed along shorelines to break wave energy and prevent erosion.
Animals with internal skeletons
- amphibiansVertebrates with aquatic larvae
- reptilesCold-blooded scaly vertebrates
- mammalsHair-bearing, milk-producing animals
- limbsBody's major appendages
digits · skeleton · spine · quadrupeds · locomotion · evolution · fossils · land
Coastal wave-blocking structure
- seawallCoastal erosion barrier
- armorProtective combat covering
- concreteSolid building mixture
- waveOscillating motion through medium
dissipation · erosion · shoreline · harbor · protection · jetty · revetment · interlocking
vertebrates
Animals with internal skeletons
- amphibiansVertebrates with aquatic larvae
- reptilesCold-blooded scaly vertebrates
- mammalsHair-bearing, milk-producing animals
limbs · digits · skeleton · spine · quadrupeds · locomotion · evolution · fossils · land · colonization
breakwater
Coastal wave-blocking structure
wave · dissipation · erosion · shoreline · harbor · protection · jetty · revetment · interlocking · blocks
- ancient tetrapods
- Cladesmammals, birds, reptiles, amphibians, insects
- coastal defensesseawall, seawalls, sea wall, sea walls, breakwater
- coastal structuresseawalls, pier, breakwaters, jetties, breakwater
- vertebratesmammals, mammal, birds, bird, reptiles
- fossilsdinosaur bones, ammonite, amber, ammonites, fossils
tetrapodssnakes
Elongated limbless reptiles
legless lizards · hexapods · centipedes · worms · arthropods
tetrapodsfish
Gilled aquatic vertebrate
fishes · sharks · bony fish · jawless fish · lampreys
tetrapodsinvertebrates
Animals without vertebral columns
jellyfish · mollusks · annelids · sponges · sea anemones