Arachinds are spiders.
No. Lobsters are related to spiders and scorpions, but nobody knows if octopus and squid are.
Spiders are Araneae/Arachnids
CLASS CEPHALOPODA * Subclass Nautiloidea: nautilus * Subclass Coleoidea: squid, octopus, cuttlefish ** Superorder Octopodiformes ** Superorder Decapodiformes *** ?Order †Boletzkyida *** Order Spirulida: Ram's Horn Squid *** Order Sepiida: cuttlefish *** Order Sepiolida: bobtail squid *** Order Teuthida: squid **** Family †Plesioteuthididae (incertae sedis) **** Suborder Myopsina ***** Family Australiteuthidae ***** Family Loliginidae: inshore, calamari, and grass squid **** Suborder Oegopsina ***** Family Ancistrocheiridae: Sharpear Enope Squid ***** Family Architeuthidae: giant squid ***** Family Bathyteuthidae ***** Family Batoteuthidae: Bush-club Squid ***** Family Brachioteuthidae ***** Family Chiroteuthidae ***** Family Chtenopterygidae: comb-finned squid ***** Family Cranchiidae: glass squid ***** Family Cycloteuthidae ***** Family Enoploteuthidae ***** Family Gonatidae: armhook squid ***** Family Histioteuthidae: jewel squid ***** Family Joubiniteuthidae: Joubin's Squid ***** Family Lepidoteuthidae: Grimaldi Scaled Squid ***** Family Lycoteuthidae ***** Family Magnapinnidae: bigfin squid ***** Family Mastigoteuthidae: whip-lash squid ***** Family Neoteuthidae ***** Family Octopoteuthidae ***** Family Ommastrephidae: flying squid ***** Family Onychoteuthidae: hooked squid ***** Family Pholidoteuthidae ***** Family Promachoteuthidae ***** Family Psychroteuthidae: Glacial Squid ***** Family Pyroteuthidae: fire squid ***** Family Thysanoteuthidae: rhomboid squid ***** Family Walvisteuthidae
No, trapdoor spiders and tarantulas belong to different families of spiders. Trapdoor spiders are part of the family Ctenizidae, while tarantulas are part of the family Theraphosidae. They have different behaviors, habitats, and physical characteristics.
Scorpions are not related to crabs. Scorpions are part of the arachnid family while crabs are a part of the crustacean family.
spiders are arachnids
Squid are phylum mollusca. They are marine cephalopods and are part of the invertebrate family. Ocean dwelling mollusks move or swim by jet propulsion. They propel themselves by ejecting water from their body. The squid ejects water from a cavity within its body.
no they are not spiders are arachnids
Yes - spiders are in the arachnid family.
The octopus is the aquatic animal that has a heart inside its head. The octopus is part of the cephalopod mollusc family.
A squid is a cephalopod, and has no skeleton at all. The only hard part of a squid is its beak.