Our natural world is rapidly losing its diversity and abundance. To slow this loss, and to better appreciate the natural world, we must begin with local nature. ZipcodeZoo works to bring the natural world to armchair, amateur, and professional naturalists. Our focus is Applied Biogeography: understanding plants and animals in their place, perhaps even your backyard.
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Across

2Organisms growing on, in or moving through sand. (7)
5Light producing, bioluminescent. (10)
8An ornament at the end of a cord, made of strings of equal length; in fish, used, e.g., to describe the fins of Latimeria chalumnae. (6)
10To artificially expose a fish, or other animal, to a pathogen. (9)
13An x-ray plate, used to see internal characters such as vertebral counts. (10)
14Referring to the side or directed toward the side or extending from the side; the opposite of medial. (7)
15A major portion of the living environment of a particular region (such as a rain forest or wetland), characterized by its distinctive vegetation and maintained by local climatic conditions. (5)
16Prefix meaning backwards. (5)
19Japanese term for sliced fish, especially tuna, usually with soy sauce and green mustard; - served raw as a delicacy, eaten immediately after preparation. (7)
22An accumulation of serous fluid in the cellular tissue or in any cavity of the body. (6)
24In ichthyology a collection of fishes made from a locality; a subset of a population; a representative part of a larger unit used to study the properties of the whole. (6)
25(pronounced "kash"). As a noun, a place for hiding something. As a verb, to hide or store food for later consumption. (5)
26A coastal or intertidal salmon net in Scotland and England with the trap set across the outer end of a leader of netting thus forming a T shape. (1-3)

Down

1Fishes of the Family Pentacerotidae, Order Perciformes (perch-likes). See FishBase for more information on this Family. (10)
2Fold of skin. (5)
3In a broad sense 'freshwater' is used for all continental aquatic systems such as rivers and lakes. In a technical sense it refers to water with less than 0.5 grams per liter of total dissolved mineral salts. (10)
4A long, narrow, and deep depression of the sea floor with relatively steep sides. (6)
6Hooked at the tip. (8)
7All the taxa in a clade preceding a major cladogenesis event. (4,5)
91) A small hollow, cylindrical structure, 2) an element of the fish kidney. (6)
11A term covering developmental stages in the early life history of a fish between the time of hatching and transforming to a juvenile, the latter a miniature replica of the adult. (6)
12Fish meat such as cod, pollack, porgy, gurnard etc. boiled, pickled into fibre and dried. (6)
15Divided into two equal parts or lobes; often used in reference to the distal ends of cirri or teeth of fishes. (5)
17A protein produced in living cells that speeds up a particular chemical reaction. (6)
18Prefix meaning current, flowing. (4)
20Prefix meaning half, partly. (4)
211)An indentation in a shoreline, may be small or long and narrow, 2)a short, narrow waterway connecting a bay or lagoon to a larger body of water, 3)an entry point for water. (5)
23Any odd-numbered page of a book, on the right. Opposite of verso. (5)

Solution
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