larval forms of nematodes
21Parasitoid — SEM image of endoparasitoid ciliates of the genus Collinia, which can cause mass mortality in affected krill populations A parasitoid is an organism that spends a significant portion of its life history attached to or within a single host… …
22Bryozoa — Temporal range: Upper Cambrian–Recent[1] …
23skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… …
24worm — wormer, n. wormlike, wormish, adj. /werrm/, n. 1. Zool. any of numerous long, slender, soft bodied, legless, bilaterally symmetrical invertebrates, including the flatworms, roundworms, acanthocephalans, nemerteans, gordiaceans, and annelids. 2.… …
25Fish farming — Intensive koi aquaculture facility in Israel Fish farming is the principal form of aquaculture, while other methods may fall under mariculture. Fish farming involves raising fish commercially in tanks or enclosures, usually for food. A facility… …
26Marine habitats — Coral reefs provide marine habitats for tube sponges, which in turn become marine habitats for fishes Littoral zone …
27Companion planting — is the planting of different crops in proximity (in gardening and agriculture), on the theory that they assist each other in nutrient uptake, pest control, pollination, and other factors necessary to increasing crop productivity. Companion… …
28Brittle star — Temporal range: 488.2–0 Ma …
29Wetland — For other uses, see Wetland (disambiguation). The Florida Everglades massive wetland system in the United States saw 1.7 billion gallons of fresh water flushed from it daily and pumped into the ocean following one of the most successive water… …
30Defense in insects — Biston betularia: the melanic carbonaria (left) and the more common light colored typica (right) Insects have a wide variety of predators, including birds, reptiles, amphibians …
