Guide to New Zealand's freshwater invertebrates
No jointed legs
-
Is it attached to the bed and does it have feeding tentacles?
Hydroids & Bryozoa -
Is it covered in a hard shell, and cannot swim?
Molluscs -
Is it a worm/leech-like animal divided into many segments?
Segmented worms -
Sponge-like growth attached to the bed with no feeding tentacles
Sponges -
Is it maggot-like with a distinct head, or breathing tube, or fleshy prolegs, or disc supporting fleshy lobes at the end of the body?
True fly larvae -
Is it a worm-like animal not divided into many segments?
Unsegmented worms