Found some freebies at Ann the Gran

Stitchery Mall - Sonia Showalter has just done a series of underwater things.

Here are several links to get you started:

Seashells:

http://www.sewforum.com/viewtopic.php?f=16&t=130429&p=1208088&hilit=seashells#p1208088
free seashell but most join-its free and worth it and has lots of free embroidery designs


http://www.oregonpatchworks.com/items.php?did=24532&pid=27913
I free hermit crab

http://www.oregonpatchworks.com/items.php?did=62521&pid=67173


http://www.embroiderydesigns.com/DesignSearchResults.aspx?SearchText=seashells&ddsearchid=Stock%20Designs

http://www.secretsof.com/content/3439?result=NPE-SEASH-4x4

Corals:

http://www.sewforum.com/viewtopic.php?f=16&t=26248&hilit=coral
lady made a quilt with these corals and sand free but must join

http://www.embroiderydesigns.com/DesignSearchResults.aspx?SearchText=corals&ddsearchid=Stock%20Designs

http://www.stitcherymall.com/display1.cfm?set_id=15290


Mermaids:

http://www.sewforum.com/viewtopic.php?f=16&t=20347&hilit=mermaid
free mermaid c bubbles free but must join

http://www.sewforum.com/viewtopic.php?f=16&t=45348&hilit=mermaid
free mermaid with plants bubbles but must join

http://www.sewforum.com/viewtopic.php?f=16&t=61615&hilit=mermaid
preety teen mermaid free but must join

http://www.oregonpatchworks.com/items.php?did=43080&pid=64634

http://www.oregonpatchworks.com/items.php?did=45841&pid=98416


http://www.secretsof.com/content/6507

http://www.oregonpatchworks.com/items.php?did=95240&pid=97823

http://www.oregonpatchworks.com/items.php?did=76649&pid=79566

http://www.oregonpatchworks.com/items.php?did=45841&pid=119310

http://www.oregonpatchworks.com/items.php?did=95240&pid=107775

Check out emblibrary. I did a set of towels for my GD's and was able to find shells, seaweed and mermaids from there,

check these posts

Also Yvonne of DBC has a Seashell font and Veronika has an Embossed Sea font if you want any letters.
There's a Sea Friends Pack in Amazing Embroidery Designs around pp. 53/54 at present.
AlmaG.