Solve these clues to fill the grid.
- Primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots
- 2 Across
- A porous mass of interlacing fibers that forms the internal skeleton of various marine animals (plural)
- 3 Across
- Having much or varied ___
- 4 Across
- The aggregate of small plant and animal organisms that float or drift in great numbers in fresh
- 7 Across
- Water that is not salty
- 8 Across
- Burrowing marine mollusk living on sand or mud (plural)
- 1 Down
- Water containing salts
- 3 Down
- Unfertilized lobster roe
- 5 Down
- Any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough
- 6 Down
