Choanocytes or collar cells are flagellated cells, presence of these cells is the characteristics feature of sponges, choanocyte helps in nutrition and reproduction.
Amoeboid cells are cells which has pseudopodia like amoebocytes (as in sponges) and WBC.
Gland cells are cuboidal in nature and present in glands.
Pigment cells are pigment containing cells present in are olar tissue e.g., Chromatophore cells which has melanin pigment.