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F I G U R E 5 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 5 Log–log plot of the relative condition factor (Krel) vs. standard length (cm) calculated from length–weight relationships (LWRs) of the species (a) Argyropelecus affinis, (b) Argyropelecus sladeni, (c) Ceratoscopelus warmingii, (d) Diaphus dumerilii, (e) Electrona risso, (f) Lampanyctus nobilis, (g) Lepidophanes guentheri, (h) Notoscopelus resplendens and (i) Scopelogadus mizolepis (Table 3). Geographic regions are indicated by linetype, symbol and colour (EQ–C, dotted line, dark-blue square; EQ–N, two-dashed line, turquoise triangle; LO–E, solid line, red circle; LO–W, dashed line, violet diamond). If present, vertical dashed grey line indicates breakpoint in the LWR estimated by segmented regression analysis (cf. Table 2)

F I G U R E 1 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 1 Stations in the eastern low-oxygen (LO–E), western low-oxygen (LO–W), northern equatorial (EQ–N) and central equatorial (EQ–C) regions of the eastern tropical North Atlantic sampled in this study

F I G U R E 4 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 4 Distribution of form factor a3.0 for 55 mesopelagic species related to (a) body shape, (b) taxonomic family and (c) species. Form factor calculated from Equation 2 using across-species slope of S = 1.358 based on 1223 fish species presented in equation 17 in Froese (2006)

F I G U R E 3 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 3 Scatter plot of mean log a (SL) over mean b for 55 mesopelagic species with information on body shape. Body shape:, elongated;, fusiform;, short-deep

F I G U R E 2 in Length-weight relationships of 55 mesopelagic fishes from the eastern tropical North Atlantic: Across- and within-species variation (body shape, growth stanza, condition factor)

F I G U R E 2 Frequency distribution of (a) mean log a (binwidth 0.2) and (b) mean exponent b (binwidth 0.1) based on 55 records (measured in centimetres and grams) of mesopelagic species of the eastern tropical North Atlantic during cruise WH383

Fig. 6. Ectoparasite-host interactions for A in Ectoparasitism on deep-sea fishes in the western North Atlantic: In situ observations from ROV surveys

Fig. 6. Ectoparasite-host interactions for A) Antimora rostrata, B) Nezumia bairdii, and C) Synaphobranchus spp. across the region for which the presence or absence of ectoparasites could be confirmed. Circle Size = Number of confirmed ectoparasite-host interactions 10 m —2. Square = No ectoparasites observed. Colors denote habitats.

Fig. 2 in Ectoparasitism on deep-sea fishes in the western North Atlantic: In situ observations from ROV surveys

Fig. 2. Example images of ectoparasites infecting various host species. A) Antimora rostrata with a lernaeopodid copepod (1059 m, Alvin Canyon); B) Synaphobranchus sp. with a sphyriid copepod (820 m, open slope); C) Nezumia bairdii with a sphyriid copepod parasitized by eight leeches (1035 m, Phoenix Canyon; D), Black fish, Diaphus sp. with an unknown siphonostomatid copepod (1130 m, cold seep) attached behind dorsal fin; E) N. bairdii with aegid isopod (780 m, open slope); F) Hoplostethus mediterraneus with a cymothoid isopod (744 m, Nygren Canyon); G) Amblyraja radiata with aegid isopod (1010 m, Alvin Canyon); and H) Cottunculus thomsonii with gnathiids (1210 m, Oceanographer Canyon).

Fig. 3 in Ectoparasitism on deep-sea fishes in the western North Atlantic: In situ observations from ROV surveys

Fig. 3. Percentage of ectoparasites infecting three common demersal fishes. Unconfirmed observations are not included.

Fig. 1 in Ectoparasitism on deep-sea fishes in the western North Atlantic: In situ observations from ROV surveys

Fig. 1. Locations of 43 ROV dives conducted along the northeastern U.S. continental margin and New England Seamount Chain. Circle Size = Number of ectoparasite-host interactions per dive. Square = No ectoparasites observed. Colors denote habitats.

Fig. 5 in Ectoparasitism on deep-sea fishes in the western North Atlantic: In situ observations from ROV surveys

Fig. 5. Mean abundance (±SE) of A) Antimora rostrata, B) Nezumia bairdii, and C) Synaphobranchus spp. per habitat (black bars). Mean abundance (±SE) of ectoparasitehost interactions (grey bars) is also included. n = number of dives during which the species was present.

Fig. 4 in Ectoparasitism on deep-sea fishes in the western North Atlantic: In situ observations from ROV surveys

Fig. 4. Mean abundance (±SE) of A) Antimora rostrata, B) Nezumia bairdii, and C) Synaphobranchus spp. per depth zone (black bars). Mean abundance (±SE) of ectoparasite-host interactions (grey bars) also included. n = number of dives during which the species was present.

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Figure 3. - Collection locations for the new records from the Canaries. 1 in New records of non-indigenous fishes (Perciformes and Tetraodontiformes) from the Canary Islands (north-eastern Atlantic)

Figure 3. - Collection locations for the new records from the Canaries. 1: Holocentrus adscensionis, 2: Cephalopholis taeniops, 3: Paranthias furcifer, 4: Prognathodes marcellae, 5: Abudefduf saxatilis, 6: Abudefduf hoefleri, 7: Acanthurus bahianus, 8: Acanthurus coeruleus, 9: Acanthurus chirurgus, 10: Acanthurus monroviae, 11: Cantherhines pullus.

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Figure 2 in New records of non-indigenous fishes (Perciformes and Tetraodontiformes) from the Canary Islands (north-eastern Atlantic)

Figure 2. - Non-native species introduced to the Canaries. A: Holocentrus adscensionis; B: Cephalopholis taeniops; C: Paranthias furcifer; D: Prognathodes marcellae; E: Abudefduf saxatilis; F: Abudefduf hoefleri; G: Acanthurus bahianus; H: Acanthurus coeruleus; I: Acanthurus chirurgus; J: Acanthurus monroviae; K: Cantherhines pullus. Scale bars = 5 cm.

Figure 5 in Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic

Figure 5. Vigtorniella spp. Haplotype network of cytochrome c oxidase subunit I (COI). Each large circle represents a sequence from an individual of Vigtorniella ardabilia that has been collected in Sweden (white) or Norway (grey). Black circles represent V. flokati, collected in the Pacific Ocean, three specimens sampled sharing the same haplotype. Letters in circles, A-G, represent haplotypes of V. ardabilia sampled in this study (Table 1). Each line represents a mutation and small empty circles are inferred haplotypes not present in the current study.

Figure 4 in Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic

Figure 4. Vigtorniella ardabilia sp. nov., specimen from whale-fall in Sweden, light micrographs: (A) parapodia from mid-body region, (B) detail of neuropodial falcigers, (C) detail of notopodial spine. Scale bar in (A) is 100 Mm, in (B) and (C) 10 Mm.

Figure 3 in Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic

Figure 3. Vigtorniella ardabilia sp. nov., specimen from whale-fall in Sweden. SEM micrographs of (A) head region dorsal view, (B) head region ventral view, (C) fine neuropodial falcigers from segment 2, (D) neuropodial falcigers from mid-body region, and (E) notopodial spine. Scale bars in (A) and (B) are 150 Mm, in (C) 7.5 Mm, in (D) 15 Mm and in (E) 6 Mm.

Figure 2 in Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic

Figure 2. Vigtorniella ardabilia sp. nov., live photo of specimen from whale-fall in Sweden. The worm is 6 mm long.

Figure 3 in Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic

Figure 3. Relationship between the number of chaetigers and total bodylength in 15 specimens of Vigtorniella ardabilia and 33 specimens of V. flokati.

Figure 6. Diagram showing Kimura 2 in Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic

Figure 6. Diagram showing Kimura 2 Parameter (K2P)-distances between congeneric species in four chrysopetalid genera, for two nuclear genes (18S, 28S) and two mitochondrial genes (16S, cytochrome c oxidase subunit I (COI)).