21. The skeleton consists of spicules that form a protective cup around each polyp. 22. The only spicules present in this species are triactines. 23. The sclerocytes are responsible for the secretion of spicules . 24. However, an intestine full of glass spicules is no problem for a hawksbill. 25. Eagles have structures on their toes called spicules that allow them to grasp fish. 26. This peduncle can be distended to better anchor the spicules throughout the polyps tissues. 27. They are characterized by spicules made out of silicon dioxide, unlike calcareous sponges. 28. However, it was eventually discovered that many species had similar spicule sheath lengths. 29. Their spicules are simple and slender, and can be straight or slightly curved. 30. Hexasterophoran sponges have spicules called hexactines that have six rays set at right angles.
