# Crab (*Brachyura*)

Crabs are crustaceans with a hard shell, two pincers, and eight walking legs. They live in oceans, fresh water, and on land. Crabs walk sideways and use their strong claws to catch food and defend themselves.

- **Category:** [Invertebrate](https://www.snappit.app/explore/categories/invertebrate)
- **Rarity:** Common
- **Danger:** 2/5 · Low
- **Habitat:** Coastal areas

![Crab](https://res.cloudinary.com/drieglelr/image/upload/v1771426583/objects/6020.jpg)

## Appearance

The Crab has a tough, usually broad, shell-like exoskeleton, often colored in shades of brown, green, red, or blue. It possesses ten jointed legs, with the front two typically modified into powerful claws. Its distinctive sideways walk sets it apart.

## Taxonomy

- **Kingdom:** Animalia
- **Phylum:** Arthropoda
- **Class:** Malacostraca
- **Order:** Decapoda
- **Family:** Brachyura
- **Genus:** Cancer

## Interesting facts

- Baby Crab insects look exactly like miniature adults, just much smaller!
- Some Crab insects can play dead for hours to trick hungry predators!
- Their tough, armored bodies are incredibly strong, protecting them like a tiny tank!
- These insects can feel vibrations in the ground, sensing prey approaching from far away!

## Special abilities

- **Ambush Master:** Crab insect can remain perfectly still because of its camouflaged body, helping them surprise unsuspecting prey from hidden spots.
- **Pincer Power:** Crab insect has strong, pincer-like forelegs that help them grasp and crush small prey or defend against threats.
- **Sidestep Scuttle:** Crab insect can scuttle rapidly sideways because of its broad body and angled legs, helping them quickly escape or position for attack.

## Measurements & details

- **Size:** 15-35 mm
- **Lifespan:** 180-365 days
- **Leg Count:** 6

## Diet & Feeding

This stealthy hunter eats smaller insects and sometimes tiny creatures found on the ground.

- **Primary Foods:** ants, small beetles, larvae, worms
- **Foraging Method:** Ambush

## Ecological connections

- **Hunts:** Brown field ant (*Formica fusca*) — Primary prey for the adult insect.
- **Eaten by:** [American Toad](https://www.snappit.app/explore/american-toad) (*Bufo americanus*) — A common predator in its habitat.
- **Shelter:** [Northern Red Oak](https://www.snappit.app/explore/northern-red-oak) (*Quercus rubra*) — Provides critical leaf litter habitat.

## Traits

- [Wildlife](https://www.snappit.app/explore/traits/wildlife): Wildlife encompasses all undomesticated animal and plant life existing in their natural habitats.
- [Social](https://www.snappit.app/explore/traits/social): Social animals live in organized groups, cooperating for survival benefits such as foraging, defense, and raising offspring.
- [Omnivorous](https://www.snappit.app/explore/traits/omnivorous): This trait identifies organisms whose diet includes both plant and animal matter.
- [Ancient Lineage](https://www.snappit.app/explore/traits/ancient-lineage): This trait signifies organisms belonging to a very old evolutionary group with ancestors dating back millions of years.
- [Coastal](https://www.snappit.app/explore/traits/coastal): Coastal habitats are dynamic environments located along the interface between land and sea, influenced by tides, waves, and saltwater.
- [Armored](https://www.snappit.app/explore/traits/armored): Armored describes animals protected by a hard, external covering or shell for defense.
- [Regenerative](https://www.snappit.app/explore/traits/regenerative): Regenerative organisms possess the ability to regrow lost or damaged body parts, tissues, or organs.
- [Nocturnal](https://www.snappit.app/explore/traits/nocturnal): Nocturnal animals are primarily active during the nighttime hours, typically resting or sleeping during the day.

## Collections

- [Insects](https://www.snappit.app/explore/collections/insects)

## Safety

**Danger:** 2/5 · Low

Observe crabs from a safe distance and avoid touching them to prevent getting pinched.

## Frequently Asked Questions

### How to identify Crab?

Look for fins, arms, tentacles, shells and body symmetry. Underwater light shifts colors, so structure and markings usually matter more than shade. Sea Creature Identifier: upload a photo and compare the visible details.

### How big is Crab?

15-35 mm

### How long does Crab live?

180-365 days

### What does Crab eat?

This stealthy hunter eats smaller insects and sometimes tiny creatures found on the ground.

### Where is Crab usually found?

Coastal areas

### How does Crab hunt?

Ambush

### How many legs does Crab have?

6

## Where to spot

- [Alaska SeaLife Center](https://www.snappit.app/guides/places/alaska-sealife-center) — Alaska, US · Zoo
- [Wallace Island Marine Provincial Park](https://www.snappit.app/guides/places/wallace-island-marine-provincial-park) — British Columbia, CA · State Park
- [Maria Mitchell Aquarium](https://www.snappit.app/guides/places/maria-mitchell-aquarium) — Massachusetts, US · Zoo

[View all places to see Crab](https://www.snappit.app/guides/where-to-see/crab)

## More Invertebrate

- [Coral](https://www.snappit.app/explore/coral)
- [Crab Spider](https://www.snappit.app/explore/crab-spider) (*Mecaphesa asperata*)
- [Garden Spider](https://www.snappit.app/explore/garden-spider) (*Araneus diadematus*)
- [Brown Recluse Spider](https://www.snappit.app/explore/brown-recluse-spider) (*Loxosceles reclusa*)

---

Source: [Crab: Characteristics, Facts & Places to See — Snappit](https://www.snappit.app/explore/crab)