Macrophotography

The jumping spider family is very easy to distinguish from other spider families because of the shape of their cephalothorax and the arrangement of their eyes. The families closest to the Salticidae in terms of morphological characteristics are the Corinnidae (distinguished by prominent spines on the rear four legs), Oxyopidae (distinguished by very prominent spines on all legs), and Thomisidae (distinguished by their four very long front legs and strong). However, none of the three families has eyes that resemble those of the Salticidae. In contrast, the legs of jumping spiders do not have any prominent spines. The front four legs of the Salticidae are generally larger than the four hind legs. Although their front legs are long, Salticidae rely on their hind legs for jumping. Generally the front legs are used to catch prey.
source