Skip to main content
Close

Eelgrass Isopod

Erichsonella attenuata

Photo by MiaZarbo
Published on Project Noah
Zoom
NominateNominate for Wildlife Photograph of the Month
reportFlag Spotting

30.435, -87.1765

Field Notes

Description:

Approximately 1.5 inches from top of head to tips of antenna. 6 pairs of legs. Body looks segmented but not 100% sure. Translucent green in color. 2 small eyes and pincer like mouth parts at one end and 2 antenna at its rear. It's an aquatic organism - marine to brackish water. Swims upright, swimming erect like a blade of grass flowing in the water.

Habitat:

Marine to brackish water, tidal grassy shallow water with light wave action. Gulf of Mexico tidal inlet area. I got this thing from Santa Rosa Sound off the Gulf of Mexico in Northwest Florida

Notes:

I have been working on growing seagrasses as an ongoing science project and since it is winter, the growing season is slowed so I have taken my project indoors and are growing the grasses in a tank. I found this little guy swimming up and down the glass. I, at first, thought it was a stray piece of grass caught in some current but it started to swim against the current. I caught it in a net and snapped this picture while it was crawling on the counter top. It definitely did not like being out of water so I'm sure it isn't a terrestrial bug that crawled and was trapped in the water.

Species ID Suggestions

Comments (4)

Welcome to Project Noah! Thanks for this interesting first spotting. I moved it to the category Arthropods :-)
I got it identified by the state and federal biologists and they all agreed this was the eelgrass isopod! So happy to finally have a name put to this critter!
I also agree with you...its a larva...The antenna like thing on its rear are its tail fins; I think so.....
perhaps it is some sort of dragonfly/damselfly larva?
Photographed
PublishedMarch 11, 2012

Accelerate our Mission to Photograph 
Every Species in the World!

Image
Butterflies icon

Wildlife Community

Wildlife Community

Join a worldwide community passionate about wildlife and nature!

Join Project Noah

Nature School

Nature School

Transform your green space into a curiosity-creating nature classroom!

Visit Nature School

Wildlife Game

Wildlife Game

Defend wildlife throughout the jungle in thrilling nature game!

Play Baboon