Medusa of a Hydroid

| View Cart ⇗ | Info

Colonial, plant-like animals closely related to jellyfish, with stinging cells, Any member of the invertebrate order Hydroida (class Hydrozoa, phylum Cnidaria). Hydroids have three basic life-cycle stages: (1) a tiny free-swimming planula larva about 1 mm (0.04 inch) long, which settles and grows into (2) a sessile (attached), usually colonial hydroid stage, which in turn liberates (3) medusa.




Benson John Lossing, ed. The New Popular Educator (London, England: Cassell & Company Limited, 1891)


TIFF (full resolution)

1554×2400, 727.1 KiB

Large GIF

663×1024, 124.0 KiB

Medium GIF

414×640, 65.1 KiB

Small GIF

207×320, 23.8 KiB