| Answer | Crossword Clue |
|---|---|
| hexactinellid | a kind of six-rayed sponge |
| hexactinellids | HEXACTINELLID, a kind of six-rayed sponge |
| hexact | a six-rayed sponge spicule |
| hexacts | HEXACT, a six-rayed sponge spicule |
| monactinal | of a sponge, having single-rayed spicules also MONACT, MONACTINE |
| triact | a three-rayed sponge spicule also TRIACTINE |
| pentact | a five-rayed structure in a sponge |
| pentacts | PENTACT, a five-rayed structure in a sponge |
