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BASIC DESCRIPTION
Unicellular protists
Mostly marine plankton organisms
Have axopods that protrude through pores in their shells
Axopods are strengthened by a cluster or microtubules
HOW DO THEY EAT?
Actinopods use axopods to trap prey
Prey becomes entangled in axopods & is later engulfed outside the main body
Cytoplasmic streaming carries prey back within the shell
RADIOLARIANS
Classified as an Actinopod
Some Actinopods secrete shells made of silica, which are known as radiolarians
Radiolarians are usually not visible to a light microsope