Don't repeat yourself, remove the parts which I slashed out.
[Pros]
<ul>
<li>Now has access to Aqua Jet + Adaptability, A major buff to Crawdaunt as he is now more viable than ever perhaps even more useful than his other counterpart, Sharpedo.</li>
<li>Really amazing in Rain teams.</li>
<li>Base 120 Attack is very acceptable in terms of raw power.</li>
<li>Can also run a possible mixed set with 90 Special Attack.</li>
<li>As of Generation 6 it's offensive typing is only resisted by a few Pokemon. </li>
<li>Great boosting moves in the likes of Dragon Dance and Swords Dance.</li>
<li>Crawdaunt's Aqua Jet is slightly stronger compared to Azumarill, reason being Adaptability.</li>
</ul>
[Cons]
<ul>
<li>It's a really slow Pokemon. 55 base Speed is not very fast even after a Dragon Dance.</li>
<li>With great offensive typing it is also a very weak defensive typing.</li>
<li>Really easy to shut down with priority moves such as Mach Punch.</li>
<li>Weak to common Pokemon such as Bug, Fighting, Electric, Grass, and the new Fairy types.</li>
<li>Shallow move-pool which makes it hard to fit Crawdaunt into any teams, only because of coverage.</li>
<li>Speed makes the difference. It's other marine counter-part, Sharpedo, slightly has an edge over Crawdaunt due to Speed Boost which means that it does not have to rely on Aqua Jet.
</ul>
If Chesnaught is really the best counter to this thing, make sure it is the first mention in the checks & counters section and not the last.