Pacific blue mussels (Mytilus trossulus) seal shut when exposed to air, but open to filter-feed when the tide comes back in.

Although the invertebrate fauna of Southeast Alaska is abundant and diverse, research has addressed only a few commercially important species. The vast majority of our invertebrates are poorly known scientifically. Southeast employs a few resident marine and intertidal ecologists specializing in invertebrates. On land, perhaps one reason we’re so poorly represented, professionally, is that we’re not an agricultural region. So we’re commensurately lacking in authorities on how to get rid of invertebrates.

Sample spread from the introduction to Hudson, Hocker & Armstrong’s Aquatic insects of Alaska (2012).

In this section

Kaxdigoowu Héen (Montana Creek): presentation for SEAL Trust

Slideshow in two parts Kaxdigoowu Héen, going back clearwater has been one of my favorite places since I first explored…

2019 | Richard Carstensen & John Hudson | slide show in 2 parts: 38 & 22 minutes

Aquatic insects book

Aquatic insects in Alaska John, Kathy and Bob collaborated on this amazing publication—yet another in Armstrong’s rich library of self-published…

2012 | John Hudson, Katherine Hocker, Robert Armstrong | 142 pages

Willson-Baldwin invert study, 2004

During the Armstrong-Willson-Carstensen Hotspots study, 2002-03, Mary Willson teamed with Aaron Baldwin to sample intertidal invertebrates throughout the Mendenhall Refuge.…

2004 | Mary Willson & Aaron Baldwin | 42 pages

Teacher walk, Wigeon Ponds, West Refuge

Discovery naturalists Steve Merli, John Hudson and Richard Carstensen walked from end Mendenhall Peninsula Road to Industrial Boulevard with staff…

2018 | Richard Carstensen | 4:21 minutes

Intertidal animals of Southeast Alaska

This 3-fold Discovery Guide helps you identify some commonly seen animals of Southeast Alaska’s rocky intertidal inside waters. Kathy’s unique…

2013 | Kathy Hocker | 2 pages

The streamwalker’s companion

This is an overview of streamwalking in Southeast Alaska intended for anyone who wants to put on a pair of…

2003 | Kathy Hocker|Terry Schwarz | 60 pages


Our laminated 4-fold guide to Streamwalking is the guide you’ll want in your pocket when you’re sleuthing the borders of…

2003 | Kathy Hocker & Richard Carstensen | 4-fold laminate

Common Sea Life of Southeastern Alaska

This full-color, 170-page guide to invertebrates and selected fish of our region covers everything from soft corals to rockfish. In…

2015 | Aaron Baldwin|Paul Norwood | 170 pages