Container feeders are not something European, they are in service world wide and come in all sizes, from very small vessels for inshore and river routes, to fairly large ones with a capacity of 3-4000 TEUs on routes like Singapore to India or Australia.
A typical European gearless feeder for inter-European Short sea routes like this one, with a capacity of 800 TEUs may have a crew of 12-15, depending on the trade (LQ for 15 pers.):
Geared feeders may serve smaller ports without gantry cranes or other container handling cranes.
This one is a regular on the R’dam to West Norway run arriving in Aalesund:
Here is one presently operating between Shanghai and Pusan:
PS> Probably doesn’t get to use the cranes much on that run.
Here is a Japanese type of Coastal feeder:
A typical European River ship used to carry containers:
A typical Sea-River container feeder:
And a typical Yangtze River feeder:
