Crinoids

Crinoids are a kind of echinoderm (like a starfish but in this case upside down). They catch food that passes by them, due to gravity (rheophobic or "current fearing") or due to currents (rheophylic or "current loving"), in their fan-limbs and pass it down to their mouths. Stem fragments can often be found as tiny circular fossils scattered in a rock. If they are aligned with each other (when the crinoid was blown sideways) they form a stem which can sometimes be followed into the rock to find the main body of the animal and its delicate arms.

Cupulocrinus sp.

Ectenocrinus simplex (crinoid) & Ceraurus pleurexanthemus (trilobites)

Blastoids

Blastoids are similar to Crinoids in that they were echinoderms and suspension feeders. The laymen's differences are that they tend to be more assymetric forms and often have less extensive limbs.

Cheirocystis anatiformis

Brachiopods

Brachiopods are a charming and ancient group of bivalved organisms. In their heyday they often grew stalks (as did the echinoderms above). Just as plants compete for light most of the creatures in this gallery went to great lengths to compete for the best water born detritus

P.S. If someone is hesitating to go out (for example to one of our meetings) feel free to call them a "sessile rheophobe"...it works
- mind you I personally tend to take it as a compliment