The subphylum Crustacea includes such animals as crabs, lobsters, shrimp, barnacles, woodlice and water fleas. Curiously, these creatures are almost never referred to as "bugs" in our popular culture, perhaps due to their popularity as food items. Like it or not, the Crustaceans are so genetically similar to insects that the two are considered "sister" groups in the phylum Arthropoda, while the arachnids and other arthropods are better thought of as their "cousins."
The vast majority of Crustaceans are fully aquatic, and hold a monopoly among the arthropoda on marine environments. In other words, very few arachnids and even fewer insects can be found in brackish or salty water, due largely to the simple fact that crustaceans were there first, and will always out-compete other arthropods in their briny domain.
This smaller representation of the edible bay-dwelling crab comes in an unnatural but rather pleasing purple coloration. The paddle-like rear legs of these crabs allow them to swim in an almost comical wobbling motion.
This solid rubber crab is common in the souvenir shops of my home state. Can you guess which? These ungodly delicious bugs (sorry, bugs...you can get me back when I'm dead) are naturally blue-green until cooked.
A cool little pink crab of the "fiddler" variety, so named for the single oversized claw in the males, who use them to fend off rivals and advertise themselves to females.
This soft rubber lobster or shrimp has extremely long, floppy antennae.
This attractively colored lobster is a water-squirting toy, and came in a set with a large pink cicada that I unfortunately misplaced at a young age. You can tell where this used to have a pair of feelers.
I got this hard little plastic crab from a seafood restaurant, where they were hooked onto wine glasses or scattered as table decorations.
These two water-squirting crabs were found at separate dollar stores, and can also be seen on another section of my website. Have you found it?! Gosh!