Geocache Answer 5

5. Blakely Harbor Park
Lat. N47 35 50      (N47 35.8333)     [N47.59727]
Long.W122 30 56  (W122 30.9333)  [W122.51583]


Latitude: How do mussels protect themselves from predators?
50. Mussel shells manufacture strong, elastic threads to attach themselves to a rock or piling so firmly that they can't be pulled off until they die. When a predator like a sea star approaches, they spin out extra threads, tethering the would-be attacker to a nearby rock or piling until it starves to death.

Longitude: What can you do to protect Puget Sound salmon habitat?
56. All of the above. Although salmon spend only a part of their life cycle in nearshore areas, these habitats are critical to the survival of salmon populations. Shoreline habitats of Puget Sound have suffered significant losses over the last 125 years.

Loss of Marshes

When marshes are lost, young salmon lose food and shelter. Studies show a 73 percent decline in salt marsh habitats bordering Puget Sound. Nearly all salt marsh habitats within major urban areas along Puget Sound have been destroyed. The Puyallup River Delta, for example, lost 100 percent of its nearshore habitat.


Recent studies show that juvenile salmon may suffer adverse effects from passing through polluted estuaries and nearshore areas. Human-caused stresses (toxic chemicals, pathogens and parasites) can cause immune dysfunction, increased susceptibility to disease, and impaired growth.


Bulkheads, seawalls, and other hard shoreline armoring structures can disrupt shore drift, starving beaches of sediments, and juvenile salmon of food and shelter. Bulkhead construction can also destroy shoreline vegetation, eliminating cover and food sources for young salmon.

Loss of Shoreline Vegetation

Loss of vegetation along the shore is of particular importance to juvenile salmon. Shoreline vegetation stabilizes the shoreline, provides shade, protective cover, organic input, and food (insects) to young salmon moving in close to shore.

Docks & Piers

Docks can block light to underwater habitats such as eelgrass meadows, a source of food and shelter for juvenile salmon and other marine life.