Table 4. Sponges from marine caves from the North-East of Bulgaria and their spatial distribution in relation to the entrance to the cave.

No	Sponges	Budova	Tulenova	Temnata dupka
1	Dysidea incrustans (Schmidt, 1862)	0–37 m	0–33 m	0–6 m
2	Protosuberites denhartogi van Soest, de Kluijver, 2003	0–42 m	0–33 m	0–70 m
3	Clathria (Microciona) cleistochela (Topsent, 1925)	0–22 m	22–25 m	9–22 m
4	Pione cf vastifica (Hancock, 1849)	6–35 m	22–33 m	22–70 m
5	Halichondria bowerbanki Burton, 1930	20–30 m	22–33 m	22–28 m
6	Haliclona sp. 1	20–28 m	25–33 m	22–28 m
7	Haliclona sp. 2	31–42 m	22–33 m	22–70 m
8	Haliclona sp. 3	No	25 m	12–15 m