Crustaceans
Pisa nodipes - Kelibia- north eastern coast - 19 mm in length
habitat: Posidonia fields.
This crab to escape from  predators covers himself with algae - at the top,  the brownish red alga Peysonnelia squamaria.
 
 
 
 
 
 
 
Palaemonetes varians- Tunis lagoon- 24 mm long
This tiny prawn  tolerates as well pollution than  very salted waters.
Photos: J. ZAOUALI