Table 1 Description of the different activities observed under laboratory conditions
Activity | Description |
|---|---|
Surface activity | |
 Surface inactivity | No visible forward/backward movement |
 Surface crawling | The animal pushes itself forward with telson, uropods, second antennae, and pereopods |
 Swimming | Mostly done vertical, and resulting from fast beating of the pleopods |
 Scraping | Surface deposit feeding: second antennae are used to scrape surface sediment with microphytobenthos into the burrow |
 Flushing (undescribed previously) | The pleopods create a faster water movement to get rid of excess sand grains and faeces from the burrow. Visible on the surface as a dust cloud |
Subsurface activity | |
 Subsurface inactivity | No visible motion, Corophium is completely in rest |
 Ventilating & filter feeding | Beating pleopods create water current through the burrow (ventilation) and both gnathopods and mouthparts process the sand grains. Ventilation and feeding do not necessarily occur at the same time |
 Subsurface walking | Walking up and down in the burrow |
 Bulldozing | Pushing excess sand grains out of the burrow with the pleon |