- (of aquatic organisms) not attached to a base nor joined in a colony; capable of swimming about freely.
Origin of free-swimming
First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for free-swimming
The young barnacles when hatched from the egg are free-swimming larv as with the other Crustacea.
The ascidian when born is a tiny, free-swimming, tadpole-like creature with a slender finned tail.
The young Sacculina is an active, free-swimming larva essentially like a young prawn or crab.
Besides the myriads of free-swimming copepods, there are parasitic forms in great number.
When the eggs hatch, the free-swimming young escape from the mantle cavity.
- (of aquatic animals or larvae) not sessile or attached to any object and therefore able to swim freely in the water