Helice is the most common crab in our upper estuaries. They are much more strongly armoured than the freshwater crab Amarinus, and the ce...
[Amarinus] (formerly [Halicarcinus]) is the only truly freshwater crab in New Zealand. They are small, with a round cephalothorax (the ma...
![[Helice] crab (Whau River, Saunders Reserve). Image: Stephen Moore](/assets/Tools-And-Resources/Identification/freshwater-invertebrates/helice_whau_river_saunders_reserve_30106_ib_650_na__FillMaxWzMwMCwyMDBd.jpg)
![[Amarinus]. Image: Stephen Moore](/assets/Tools-And-Resources/Identification/freshwater-invertebrates/amarinus_2011_6xmontage_b_650_na__FillMaxWzMwMCwyMDBd.jpg)