See diatom.
Glossary: diatomic algae
Glossary: diatoms
Plural of diatom.
Glossary: dichotomous key
Species identification key comprising pairs of alternative choices arranged in a series of couplets, used commonly in ichthyological papers.
Glossary: dichotomy
A division of organisms into two groups, typically based on a characteristic present in one group and absent in the other.
Glossary: dichromatic
Having two different colour forms independant of sex or age.
Glossary: dichromatism
The quality or condition of being dichromatic.
Glossary: dimorphic
Exhibiting dimorphism.
Glossary: dimorphism
In biology, the occurrence within a species of two forms which differ distinctly from one another in one or more characters, e.g., colour pattern or morphology.
Glossary: dioecious
Within a species, having the male and female reproductive organs in separate individuals.
Glossary: diploid
Containing two complete sets of chromosomes, i.e., one from each parent.
Glossary: disjunct
Distinctly separated from one another.
Glossary: dispersal
Distribution.
Glossary: dissolved oxygen
The concentration of oxygen dissolved in a water body. Normally expressed in milligrams per liter, parts per million, or percentage saturation.
Glossary: distal
Located away from the point or origin of attachment or a central point of the body. Opposite of proximal.
Glossary: distensible
Capable of being distended or extended; able to stretch.
Glossary: distributary
Type of stream or river that branches off and flows away from a main channel. Particularly common in river deltas, but also occur inland in some cases.
Glossary: dither fish
Fish or group of fish, typically inhabiting open water in the mid-to-upper water column, used by aquarists to reduce innate shyness in other species.
Glossary: diurnal
Of, relating to, or occuring during daylight hours; having a daily cycle. Opposite of nocturnal.
Glossary: diurnal rhythm
See circadian rhythm.
Glossary: divergence
The state of being divergent.
Heros efasciatus (Severum)
Do you have any sources, Exodus1500?
19th Apr 2018
Corydoras robineae (Flagtail Cory)
Sexual Dimorphism Like most corys, C. robineae is most easily sexed when viewed from above. Females are noticeably rounder and broader-bodied than ...
19th Apr 2018
Corydoras splendens – Emerald ‘Brochis’ (Brochis splendens, Brochis dipterus)
References 6: is incomplete and thus biased. Please amend the reference and include the full publishing details: The book Identifying 'Corydoradin...
12th Apr 2018
Heros efasciatus (Severum)
Artie is correct, but his information is outdated. There is only one mouth brooding Heros/Severum. It is Heros liberifer. The liberifer was for a...
4th Apr 2018
Species profile problems
Hi, The species in the genus Carnegiella do not appear with any of the search functions. I know they are there, I added C. myersi myself a couple ...
29th Mar 2018