Arthropods, more specifically, crustaceans, have a thick, tough cuticle and two pair of antennae. The cuticle acts as an exoskeleton and two pair of antennae to help them find food and keep them safe.
crustaceans
They have 5 pairs of "legs" (-> 10 legs) [paraeopodes], but only use 6 of them for walking. 2 pairs have little pincers. They also have 5 pairs (-> 10 legs) of swimminglegs [pleopodes]. This gives them 20 legs or 10 pairs out of which they use 6 or 3 pairs for walking.
Six legs. Head, thorax and abdomen. Exoskeleton. Development by metamorphsois. Usually one or two pairs of wings. Antennae.
The answer is very simple. an octopus of course It has no antannae but do own an exoskeleton,
Antenna is singular - a car has a radio antenna. Antennae is plural - insects have two antennae.
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Insecta
A crustacean is an arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae. Arachnids are arthropods with two body sections, four pairs of legs, and no antennae. Arachnids are arthropods with two body sections, four pairs of legs, and no antennae.
crustaceans
Crustaceans have exoskeletons, two pairs of antennae, two pairs of maxillae, biramous legs, and mandibles, which are like jaws.
Lobsters, like all crustaceans, have two pairs of antennae.
Shrimp have six legs. They also have four pleopods.
They have 5 pairs of "legs" (-> 10 legs) [paraeopodes], but only use 6 of them for walking. 2 pairs have little pincers. They also have 5 pairs (-> 10 legs) of swimminglegs [pleopodes]. This gives them 20 legs or 10 pairs out of which they use 6 or 3 pairs for walking.
Crustaceans are the only arthropods with two pairs of antennae
Crustaceans have two pairs of antennae, two pairs of maxillae, a mandible, which are like jaws, biramous legs, and are covered in an exoskeleton.
Crustaceans are arthropods characterized (and classified) by their biramous (branching) appendages, which include two antenna pairs. The smaller set are referred to as antennules. All other arthropod groups have one pair except chelicerates and proturans, which have no antennae.
Crustaceans are animals like crabs, lobsters, and crayfish. Crustaceans have two pairs of antennae, two pairs of maxillae, and mandibles, which are like jaws. They are biramous, which means their legs bend in two places.