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| Crimea | Length (m) | Depth (m) | Area (m2) | Width of the enter (m) | Sponge species number | Bulgaria | Length (m) | Depth (m) | Area (m2) | Width of the enter (m) | Sponge species number |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Love | 101 | 4–1.2 | 1,168 | 27 | 7 | Tulenova | 83 | 4–1.2 | 692 | 19 | 8 |
| PK-356 | 24 | 3–0.8 | 130 | 7 | 4 | Temnata dupka | 74 | 3–0.5 | 345 | 19 | 8 |
| PK-324 | 9 | 2.5–1 | 40 | 4 | 4 | Budova | 50 | 3.5–1 | 240 | 8 | 7 |
