Preview (15 questions)
1 Question
30 seconds
Q.


Spider crab

Heterotremata

Pilumnoidea

Jonas

2 Question
30 seconds
Q.


Trapeziidae

Raninidae

Selatium

Ixa

3 Question
30 seconds
Q.


Snow crab

Trapeziidae

Menippe

Scylla

4 Question
30 seconds
Q.


Selatium

Flower crab

Cancer pagurus

Jonah crab

5 Question
30 seconds
Q.


Bythograeidae

Xanthidae

Quadrella

Pea crab

6 Question
30 seconds
Q.


Fiddler crab

Florida stone crab

Ocypodoidae

Bythograeidae

7 Question
30 seconds
Q.


Snow crab

Tasmanian giant crab

Land crabs

Carpilioidea

8 Question
30 seconds
Q.


Carpilioidea

Sesarma reticulatum

Dromiidae

Jonah crab

9 Question
30 seconds
Q.


Potamidae

Scylla

Xanthidae

Carpilioidea

10 Question
30 seconds
Q.


Ocypode

Menippe

Cancer

Charybdis crab

11 Question
30 seconds
Q.


Heterotremata

Eubrachyura

Ranina ranina

Notopus dorsipes

12 Question
30 seconds
Q.


Pilumnoidea

Raninoida

Chesapeake blue crab

Jonas

13 Question
30 seconds
Q.


Pilumnoidea

Giant mud crab

Portunidae

Gecarcinucidae

14 Question
30 seconds
Q.


Callinectes

Portunus

Fiddler crab

Scylla

15 Question
30 seconds
Q.


Ocypode

Pea crab

Christmas Island red crab

Notopus dorsipes