Merwyrms.  Games Workshop offers a Merwyrm conversion kit that was way too complicated for me.  Instead I built mine from various parts of a Dark Elf Hydra.

Merwyrms.  From the other side.
 

Sea Guard.  I painted three such units for the Storm of Chaos summer campaign.  The models were constructed using elf archer heads, elf spearman left arms, archer right arms, spearman torsos, archer legs, quivers, and crescents.  The banner depicts an eagle flying over the waves, with a fish in its grasp.
 

Ship's Company.  These are legal only in Sea Patrol armies.  Although I view Ship's Company as a questionable army choice, I decided to paint them because I liked the conversion I had devised.  They were constructed using spearmen heads, spearman-champion sword arms, spearmen left arms, archer torsos, spearman legs, archer feathers, bows/quivers, and spearman shield emblems used as the shields themselves.  I entered these in a local GW-sponsored painting contest, but withdrew upon hearing that the contest's second round would transport my models to parts unknown.
 

Repeater Bolt Thrower.
 

Sea Lord Aislinn.  This could be any High Elf character, but I painted him specifically for the Storm of Chaos campaign.  Typically I equip him with Armor of the Gods and a great weapon.  This boosts him to Strength 7 and lets him chop chariots in half.  To build him I started with a White Lion champion (also sold as Captain Korhil for some reason), and removed the head, and the axe.  The model had a hole in the back to mount a Lion Cloak; I covered this hole with an elf spearman bow/quiver - which is practically mandatory anyway, given the Sea Lord's Master of the Mists ability.  His sword comes from a Silver Helms sprue.  His head is a pointy Silver Helm with the top carved off.  I also added a crescent, to match those worn by the Sea Guard.  Finally, to differentiate him from a bare-chested White Lion, I painted his upper body to look like plate armor.
 

Sea Patrol Army.  Nearly every model shown here was painted specifically for the Storm of Chaos campaign.  Exceptions: the two skirmishing units in front, and the two mages barely visible in the rear.  Nearly every model is capable of ranged attack, but has little hitting power.  When winning, the army dishes out maximum psychological punishment to the opposing player...
 
 

Figures painted and photographed by Kevin Sterns
The photos were shot on my dining room table with no flash.
A tripod was used to accomodate shutter speeds down to 1 second.
Sensitivity was locked in at ISO 200 (equivalent).
I used a manual white balance, so no color corrections were needed.