| Named By: | Charles Doolittle Walcott in 1912 |
| Time Period: | Mid Cambrian |
| Location: | Canada, British Columbia - Burgess Shale |
| Size: | About 2 centimetres long |
| Diet: | Detritivore |
| Fossil(s): | Over 25,000 individuals have been recorded |
| Classification: | | Arthropoda | Marrellomorpha | Marrellida | Marrellidae | |
Marrella splendens is an extinct arthropod known from the middle Cambrian Burgess Shale of British Columbia. It is the most common animal represented in the Burgess Shale.