| Answer | Crossword Clue |
|---|---|
| OTTER | Marine mammal that lacks blubber |
| OTTERS | Marine mammals that lack blubber |
| lancelets | A small elongated marine invertebrate that resembles a fish but lacks jaws and obvious sense organs. Lancelets possess a notochord and are among the most primitive chordates |
| mesozoans | A minute worm that is an internal parasite of marine invertebrates. It lacks any internal organs other than reproductive cells, and dissolved nutrients are absorbed directly from the host's tissues |
