What is the connection between the three parts of the Pasuk?
Rashi: Zevulun were merchants, whose ships carried merchandize to foreign countries, predominantly to Tzidon, their northern neighbors (who were a nation of traders).
Rashbam: The people would go down to the port to purchase the goods that the ships of Zevulun brought back from overseas, 1 predominantly from Tzidon (who were a nation of traders).
Seforno: They would take their merchandise (a type of fish, Chilazon and white glass) 2 across the sea by ship to the shores of other countries.
Targum Onkelos: They captured territories in their ships, and took 'the best of the sea' as spoil; and their territory extended as far as Tzidon. 3
Why did Ya'akov bless Zevulun before his older brother, Yisachar?
Rashi and Seforno: Zevulun traded with nations, and shared his income with Yisachar, 1 thereby enabling Yisachar to study Torah. And since Yisachar was able to immerse himself in Torah thanks to Zevulun, 2 Ya'akov gave him precedence. 3
Why does it say "l'Chof Aniyos Yishkon"?
Da'as Zekenim: Ships do not want to enter ports far from the city, for then they must carry the merchandise a long way. Zevulun's cities were close to the ports.