matamaru: that's pretty good. yeah. nice cleaning. better than this one. it's really good. narrator: here, 100 metric tons of tuna are skinned, deboned, processed, canned, and packaged every single day. matamaru: this cannery, it's really important to the people here, to their lives, to their families, and to the surrounding communities as well. we are worried if the tuna stock is gone 'cause the job here depend very much on the fish that we have in our waters. narrator: the same tuna that provide jobs at the sole tuna processing plant also keep a small fleet of solomon fishing boats working. man: ok, guys, come on. let's go. narrator: the "solomon ruby" is heading to sea in the hopes of catching 350 metric tons of skipjack tuna. man: "solomon emerald," "solomon emerald," copy. narrator: fishmaster junior delaverata grew up in the solomons and commands a crew of his fellow islanders. he says technology has become an essential tool in the boat cockpit. delaverata: it's quite easier now. when there's a spot of fish 100 meters away, the sonar can tell you the density of fish,