Crinoid Holdfast Bulb Replica – A few species were bottom bobbers and floaters. The Crinoid Holdfast Blub Replica measures 3.7 wide by 4.0 height and they are museum quality polyurethane resin replicas.

These unique crinoids are believed to have floated with the currents with the calyx (head) facing down. The Lobolith was chambered and filled with some form of gas produced by the crinoid. The gas caused the crinoid to float and could probably be regulated to allow the crinoid to move up and down in the water column.

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Additional information

Weight 3 lbs
Dimensions 3.7 × 4.0 in
Crinoid Facts:

Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Subphylum: Crinozoa
Class: Crinoidea