I think all the problems can be easily avoided by just reducing the amount of crabs, alongside with the quanta cost.
Overall, do not underestimate the denial power of this card. Putting 10 mostly useless cards in your opponent's deck is huge. I think, 3-5 crabs are enough, make them 2|1 to be a bit more valuable, and put the cost to around 4-7, depending on the amount of crabs.
On another note: The name of the card is as strange as it is called - I don't see any relevance to the actual effect.