Arthropod - Spiders

The common name of this Arthropod is Spider, this is an animal which many of us is familiar with.  However something that most people did not know about this animal is that it has 4 eyes all together, 2 small ones on the sides and 2 big ones in the middle as you can see from this picture,which, was of most interest to me while choosing it.  Spiders share many similar characteristics with Arthropods such as: they have bilateral symmetry as them, segmented bodies arranged into regions called Tagmata and finally, possessing the most centralized nervous system among the arthropods.

Squid

Most interesting thing about the squid in my opinion is that they have gill hearts because I heard of animals having gills but not gill hearts.  They are useful in their environment because they clean up their surrounding by eating detritus.