Pseudorhiza haeckeli, or Haeckel's jelly, is a species of cnidarian of the family Lychnorhizidae.

[1] The animal has a bell which is round with raised, warty lumps on the upper surface.

[3] The tail of Haeckel's Jellyfish can be damaged while capturing prey and may be attacked by other animals.

The warty lumps on the bell and the curved arms contain stinging cells, to which humans are only mildly sensitive.

This jelly is often seen in association with amphipods, parasitic anemones[3] or schools of small fishes which shelter around its arms and bell.