Swim, Mass
(Spell Compendium, p. 217)Transmutation [Water]
Level: Druid 4,
Components: V, S, M,
Casting Time: 1 round
Range: Medium (100 ft. + 10 ft./level)
Target: One creature/level, no two of which are more than 30 ft. apart
Duration: 10 minutes/level (D)
Saving Throw: None
Spell Resistance: Yes (harmless)
Choosing carefully the recipients of your spell, you cause a blue-green glow to emanate from each one. Moments later, the emanation fades, leaving the chosen creatures looking more lithe but with more robust limbs.
The spell functions like swim, except that it affects multiple creatures.